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why is photosynthesis an example of a chemical reaction

Why is photosynthesis an example of a chemical reaction, and why is it classified as endothermic?
17,055 results
Science
Why is photosynthesis an example of a chemical reaction, and why is it classified as endothermic?

asked by Pier on February 10, 2018
Science Question Help!!
Why is photosynthesis an example of a chemical reaction, and why is it classified as endothermic. Can someone help me with this please!!

asked by that emo girl! on March 15, 2018
Science
Why is photosynthesis an example of a chemical reaction, and why is it classified as endothermic? Help please

asked by Jess on November 28, 2016
Science PLEASE HELP ASAP
Why is photosynthesis an example of a chemical reaction, and why is it classified as endothermic?

asked by Rodeo~Babe on April 5, 2018
Science
Why is photosynthesis an example of a chemical reaction, and why is it classified as endothermic?

asked by Zack on March 13, 2015

science
Why is photosynthesis an example of a chemical reaction, and why is it classified as endothermic?

asked by cuz im not too smart. on March 7, 2016
Science
1) Why is photosynthesis and example of a chemical reaction, and why is it classified as endothermic? 2) how do everyday activities like driving a car using electricity less to global warming?

asked by I’m dumb on October 30, 2018
biology (check answers)

  1. How do endothermic and exothermic reactions differ? a. Endothermic reactions release energy and are spontaneous. b. Exothermic reactions release energy and are spontaneous. c. Endothermic reactions give off heat and light. d. Photosynthesis is

asked by Dizzie on October 3, 2016
biology (check answers)

  1. How do endothermic and exothermic reactions differ? a. Endothermic reactions release energy and are spontaneous. b. Exothermic reactions release energy and are spontaneous. c. Endothermic reactions give off heat and light. d. Photosynthesis is

asked by Dizzie on October 2, 2016
Science
Is photosynthesis a endothermic reaction

asked by Anonymous on December 14, 2015
Science
Which of the following is true about photosynthesis? A. It is an exothermic reaction. B. It is an endothermic reaction. C. It produces carbon dioxide. D. It occurs in animals.

asked by Anonymous on February 6, 2019
Science
Which of the following is true about photosynthesis? 1). it is an exothermic reaction. 2). it is an endothermic reaction. 3). it produces carbon dioxide . 4). it occurs in animal.

asked by Leo the Lion on October 8, 2018
Science!
1) Which of the following is true about photosynthesis? A. it is an exothermic reaction B. it is an endothermic reaction C. It produces carbon dioxide D. it occurs in animals I think it’s A.

asked by Anonymous on February 24, 2016
Chemistry
Another fill in the blank Show the chemical reaction equation for the process known as photosynthesis by filling in the blanks below ++ —> +_ search for photosynthesis reaction on Google.

asked by Steve on May 16, 2007
bio
Assignment: Photosynthesis and Cellular Respiration Energy acquisition is essential for all life. Whether the organism is classified as plant or animal, single-celled or multi-cellular, the exchange of energy and the formation of products consist of a

asked by sabrina on April 12, 2009

Science
I don’t understand this question… Which side of the chemical equation would energy be located on in an endothermic reaction? I understand that in an endothermic reaction it absorbes energy.

asked by Emily on February 28, 2008
Biology
What is the overall chemical formula for photosynthsis? 6Co2+6H2O—>C6H12O6+6O2 Where does the energy come from in photosynthesis? From Sunlight? What is the relationship between photosynthesis and respiration Photosynthesis makes the glucose that is used

asked by Anonymous on November 16, 2015
Chemistry

  1. The delta Hf of an element in its standard state is defined to be a) 0 kJ/mol b) 10 kJ/mol c) -10 kJ/mol d) greater than 0 kJ/mol e) a unique value for each element I am assuming its a? 2. Which of the following statements are true? I) The reaction

asked by Bobby on July 21, 2010
Chemistry
Atom-Particle that cannont be divided in half becasue it is in its smallest form. Reactants-Substances that exist before the reaction begins. Endothermic Reaction-take in, or absorb heat energy. Exothermic Reaction- Release Heat energy Inhibitor-makes a

asked by Tom on October 8, 2007
Chemistry
Is the reaction involved in dissolving ammonium chloride in water an endothermic reaction or exothermic reaction? Why? I am pretty sure it is endothermic, but I am just not sure why ?

asked by Anonymous on November 8, 2009
gen chem
A nuclear reaction, such as the transmutation of uranium-238 to a stable isotope lead-206, involves exothermic and endothermic processes. In this reaction, is there any physical and chemical changes involved?

asked by Anonymous on August 8, 2010
Chemistry
The equation for fermentation of glucose to alcohol and carbon dioxide is C6H12O6= 2C2H5OH + 2CO2 The enthalpy for the reaction is -67kj. Is the reaction endothermic or exothermic? Is the heat energy absorbed or released as the reaction occurs? I think its

asked by Megan on April 20, 2016
SCIENCE
How does temperature change during a chemical reaction. (Note: it has to be a Endothermic and exothermic reactions) Thanks

asked by DEEZ GOT HEE on December 22, 2015
Chemistry – enthalpy and rate constant (check)

  1. The rate of a chemical reaction is dependent on its ΔH. Do you agree or disagree with this statement? Briefly justify your answer. I agree with the above statement, enthalpy is defined as the internal energy of the reactants and products therefore the

asked by Farah on June 8, 2011
Chemistry
Is CO + O2 -> CO2 an endothermic or an exothermic reaction? Also, are all combustion reaction endothermic? Thanks in advance.

asked by Namie on May 7, 2012

Biology
Cellular Respiration and Photosynthesis co-exist as paired metabolic processes. Photosynthesis uses light energy to convert carbon dioxide into glucose, a simple sugar, in two steps, the light dependent and light independent reactions. Oxygen is produced

asked by Tammy on June 12, 2009
biology help
Does photosynthesis require energy? What type of energy reaction would photosynthesis be? Is photosynthesis an example of a coupled reaction?

asked by miyagi on July 10, 2011
chemistry
why photosynthesis is considered as endothermic?

asked by darsini on April 12, 2017
Biology
light energy is converted to chemical energy in the process of Photosynthesis? The process where plants transfer solar energy into chemical energy to make organic molecules (glucose) is known as Photosynthesis also>?

asked by Anonymous on December 12, 2015
chemistry
write a balanced chemical equation for the process of photosynthesis and the conditions of the reaction giving physical state of all the substances

asked by aakriti on June 15, 2015
biology
Cellular Respiration and Photosynthesis co-exist as paired metabolic processes. Photosynthesis uses light energy to convert carbon dioxide into glucose, a simple sugar, in two steps, the light dependent and light independent reactions. Oxygen is produced

asked by Anonymous on November 21, 2008
Chemistry check
Can someone check to make sure my answer is correct? The question is: Which of the following statements is incorrect? a. Complete combustion has occured when all the carbon in the product is in the form of carbon dioxide. b. A single reactant is the

asked by Mike on March 17, 2009
Science
Please summarize this. I got it from a website and im doing my notecards. Im not trying to plagiarize, Im just not a science person. Please just summarize it so I can just understand it so I can explain it in my own words: The light reaction happens in the

asked by Losa on October 14, 2013
Chemistry
HCl (aq) + NaOH (aq) -> NaCl (aq) + H2O (l) Will the neutralisation reaction be endothermic or exothermic? Hint: think about the net ionic equation. So, taking the hint, I got: OH- + H+ -> H2O Not sure how that helps, and now I’m stuck; how would I figure

asked by A Canadian on February 10, 2013
Chemistry
The energy necessary to start a chemical reaction is called the _ energy. a)exothermic b)activation c)endothermic d)combustion

asked by Thelma on July 23, 2010

Chemistry
H2 and F2 react according to the following equation, forming HF. H2(g) + F2(g)  2HF(g); H° = –271 kJ If H2(g) and F2(g) were mixed in a thermally insulated vessel, the reaction that occurred would be a. endothermic, and the temperature of the

asked by Kayla on July 2, 2013
chemistry
An endothermic reaction was found to have an activation energy of 100 kJ. If this reaction is reversed, the activation energy is only 20 kJ. What is the value of delta H for the endothermic reaction?

asked by amanda on December 30, 2011
chemistry
What kind of reaction occurs when a molecule of glucose reacts with oxygen to give carbon dioxide and water? a.exothermic reaction b.endothermic reaction c.synthesis reaction d.irreversible reaction

asked by nina on June 11, 2011
bio lab
Why photosynthesis does not occur in calibration tube which has water and chloroplast? Why we used deveined spinach leaves in photosynthesis reaction

asked by mas on November 29, 2011
Organic Chemistry
The Diels-Alder reaction is classified as a: A. polar reaction B. radical reaction C. substitution reaction D. pericyclic reaction E. rearrangement reaction

asked by nilee on March 6, 2009
science
Which of these is an example of a chemical reaction that occurs at a very fast rate? A: Rotting wood. B: An explosion. C: Photosynthesis. D: Iron rusting. I personally think it’s A, but I’m not completely sure of my answer, which is why I referred to

asked by boi on November 7, 2017
Chemistry
Which of the following chemical reactions is an example of an endothermic reaction? A. Making ice cubes from liquid water B. Burning a candle C. The evaporation of water D. The combustion of gasoline I think c

asked by Morgan on November 22, 2014
Biology
Write an equation to summarize the photo reaction of photosynthesis. Since this is not my area of expertise, I searched Google under the key words “photosynthesis equation” to get these possible sources: (Broken Link Removed)

asked by Raj on March 15, 2007
chemistry
1 2Mg + o2 –> 2Mgo 2 MgCo3 –> MgO + Co2 3 Co2 + Ca(OH)2 –> CaCo3 + h2O 4 Zn + 2HCl –> ZnCl2 + H2 5 2H2 + O2 —> 2H2O 2 KI + Pb(NO3)2 –> 2KNO3 + PbI2 endothermic is absorbs energy. exothermic is releases energy. which of those reaction are

asked by peter on November 8, 2012
AP CHEM– check work?
How many moles of ATP must be converted to ADP by the reaction ATP(aq) + H2O —> ADP(aq) + HPO4-2(aq) + 2H+(aq) delta-G= -31 kJ to bring about a nonspontaneous biochemical reaction in which delta-G= +372 kJ? I did my work out like this..: 372 kJ x 1

asked by janelle on April 15, 2007

biology
Which of the following is true about the relationship between energy and chemical reactions? Activation energy is required for a chemical reaction to occur. Activitation energy is not necessary in a chemical reaction which releases energy. Chemical bonds

asked by ballamoney1 on April 15, 2010
Science, Chemistry
Using chemical equations, write the chemical reactions for the following; photosynthesis, combustion, corrosion of iron.

asked by Elle on June 5, 2017
chem
How do these things shift the direction of a chemical reaction?: -adding/removing reactants -adding/removing products -adding/removing energy This is how I think I understand it: -adding more reactants pushes it to the right -removing reactants pushes it

asked by Mira on March 17, 2007
chemistry
For which of the reactions listed below will Gibbs free energy always be negative? A. An exothermic reaction that increases in entropy B. An endothermic reaction that decreases in entropy C. An endothermic reaction that increases in entropy D. An

asked by Cortey on November 27, 2014
chemistry
Which of the answer choices correctly describes an action that will increase the solubility of a solid solute in water? cool the solution increase the pressure heat the solution decrease the pressure Examine the statement. The energy required to break the

asked by PLEASE help on September 22, 2017
chemistry
Which of the following can we predict from an equilibrium constant for a reaction? 1 The extent of a reaction 2 Whether the reaction is fast or slow 3 Whether a reaction is exothermic or endothermic a. 1 only b. 2 only c. 3 only d. 1 and 2 only e. 1 and 3

asked by Aungsan on May 14, 2010
AP BIOLOGY LAB
I am doing an ap biology lab on plant photosynthesis. It’s specifically lab # 4 on plant pigments and photosynthesis and it’s on question # 8 on Exercise 4B: Photosynthesis/ The Light Reaction. Identify the function of each of the cuvettes. I already have

asked by Roger on November 2, 2008
Cemistry
If you have a chemical reaction in equilibrium and add more of the product…what happens to the product’s concentration, if it doesn’t increase? Does it stay the same or decrease a little? I know the reactants concentration will increase and if it is an

asked by Connie on February 19, 2010
? on Chemistry
If you have a chemical reaction in equilibrium and add more of the product…what happens to the product’s concentration, if it doesn’t increase? Does it stay the same or decrease a little? I know the reactants concentration will increase and if it is an

asked by Connie on February 19, 2010
Chemistry
(1) Use the thermodynamic values to (a) deduce the enthalpy change of each reaction (b)state if the reaction is exothermic,or endothermic,and also how much energy is released or absorbed. For thi reactions; (1) NH4NO3 (s)——>N2 (g) + 2H2O (l) (2) 4Zn

asked by Shane on March 12, 2013

Physics- Energy Released In Chemical Reaction
The reaction between two hydrogen isotopes is shown below: 2H + 3H → 4He + n + energy released The energy released in this reaction is: a.equal to that in a fission reaction b.equal to that in a chemical reaction. c.less than that in a chemical reaction.

asked by MM on December 15, 2016
Science
1) Which of the following is true about photosynthesis? A. It is an exothermic reaction B.It is a endothermic reaction * C.It produces carbon dioxide D. It occurs in animals 2) Atomic Theory is A.Subject to change if new information is discovered B.A

asked by noname on November 11, 2015
Minoxidil
So, I’m doing a research project for my chemistry class, and one of the parts that I have to answer is the chemical reaction of the substance that I’m researching. But there’s a problem. I’ve searched every single website regarding minoxidil, but I cannot

asked by Jude on May 28, 2012
chemistry
What is the difference between biochemical, pharmaceutical, and diagnostic chemical reactions in healthcare? What is a specific example that exists for each of these chemical reaction types above and why might it be of importance to healthcare

asked by slomomo on May 16, 2014
chemistry
write a balanced equation for photosynthesis. express the answer as a chemical equation. identify all of the phases in the answer. during photosynthesis, plants use energy from sunlight to form glucose (C6H12O6(s)) and oxygen from carbon dioxide and water

asked by jen on October 25, 2011
chemistry
How do these things shift the direction of a chemical reaction?: -adding/removing reactants -adding/removing products -adding/removing energy Thanks! It depends upon the equation and whether the reaction is exothermic or endothermic. Post the entire

asked by Mira on March 15, 2007
chemistry
three questions please: (1) What kinds of evidence can you use to determine if a chemical reaction has occurred? (2) How do the properties of the cooked egg differ from the properties of a raw egg? (3) how are the endothermic and exothermic reactions the

asked by lexi on December 2, 2008
AP Chemistry
Hey guys! I’m stuck on some study guide problems… (On the bottom of this, I put what answers make sense to me) A) A factor that affects the speed of heterogeneous reactions but not of homogeneous reactions is 1)nature of reactants 2)concentration of

asked by Allie on September 23, 2015
chemistry
3HgO→2Hg+O2 Which of the following can definitely be concluded from the equation and heat of reaction above? A. The reaction is spontaneous. B. The reaction is non-spontaneous. C. The reaction is endothermic. D. The reaction is exothermic. E. None of

asked by KO on January 23, 2017
Physical Science
Which of the following statements are true about chemical reactions? Check all that apply. A. Reactants are on the right when writing a chemical reaction. B. Products are produced in a reaction. C. Reactants are present at the end of a reaction. D.

asked by jen on January 27, 2015

Chemistry

  1. For the reaction 2N2O(g) ⇋ O2(g) + 2N2(g), what happens to the equilibrium position if the pressure decreases? A. Shift to the right B. Shift to the left C. Doubles D. Does nothing E. Halves 2. if an equilibrium reaction shifts to the right when the

asked by josh on October 16, 2012
chemistry
If a particular reaction absorbs 252 kJ of heat while doing 105 kJ of work at constant pressure. What are the ΔE and ΔH for values for the reaction? Is the reaction endothermic or exothermic?

asked by Mai on April 12, 2014
chemistry
Examine the scenario. Chemical Reaction A and Chemical Reaction B involve the same two reactants. Chemical Reaction A is performed in a hot container, while Chemical Reaction B is performed in a cold container. Which of the answer choices correctly

asked by PLEASE help on September 5, 2017
chemistry URGENT (2)
Label each of the following reactions as exothermic or endothermic (“exo” or “endo”), and according to whether work is done on or by the system (“on” or “by”)? Note that no “en-on” cases appear here, as these are always thermodynamically unfavourable.

asked by Anonymous on November 16, 2008
chemistry
Label each of the following reactions as exothermic or endothermic (“exo” or “endo”), and according to whether work is done on or by the system (“on” or “by”)? Note that no “en-on” cases appear here, as these are always thermodynamically unfavourable.

asked by Anonymous on November 16, 2008
Chemistry
In an endothermic reaction at equilibrium, what is the effect of raising the temperature? The reaction makes more products the reaction makes more reactants*** the reaction is unchanged the answer cannot be determined

asked by Jordan on May 4, 2016
College Chem

  1. Write the balanced equation for CH4+Cl2„_CH2Cl2+HCl6. For the reaction in problem 4, Heat of Reaction = -118.3 kcal/mol. Identify whether this is an exothermic or endothermic reaction. Calculate the Heat of Reaction when 6.00 g of Cl2 are used in the

asked by Kathleen on March 29, 2010
chemistry
what are some the different types of chemical reactions that occur on a daily basis our lives? wouldnt there be many? eating, taking medications, would emotion be or cause chemical reaction? All of the above. Add breathing. Don’t forget the cars we drive,

asked by key on February 14, 2007
Chemistry
I think I made a mistake with my previous question. I have two solutions potassium thiocyanate (KSCN) and iron (III) chloride (FeCl3). The reaction is Fe+++(aq) + SCN-(aq) FeSCN++(aq) What will happen if the solution is heated? Will the reaction rate shift

asked by Fiona on May 2, 2007
chem
Check the correct statements for the above reaction. Choose at least one answer. a. The reaction is exothermic. b. The reaction is endothermic. c. The change in entropy is positive. d. The change in entropy is negative. e. The reaction is at equilibrium.

asked by Anonymous on March 30, 2013

science
a) calculate the heat of reaction, in kilojoules, for the reaction: 2NO2(g) + 3H2(g)—>2NH3(g) + 2O2(g) b) is the reaction endothermic or exothermic? how can you tell? I will be happy to critique your work on this. You will have to look up the heats of

asked by michelle on January 18, 2007
Chemistry
Someone said, “Calculate the total delta H of the reaction and subtract the total delta H of the product from it. If you get a positive value, it radiates heat which means it’s exothermic. If it is negative, heat is needed to get a reaction so it is

asked by A Canadian on February 11, 2013
Chemistry
Someone said, “Calculate the total delta H of the reaction and subtract the total delta H of the product from it. If you get a positive value, it radiates heat which means it’s exothermic. If it is negative, heat is needed to get a reaction so it is

asked by A Canadian on February 11, 2013
Chemistry
MF17083:For the following reaction find Kp at 25°C and indicate whether Kp should increase or decrease as the temperature rises. NH4HS(s) H2S(g) + NH3(g); DH° = 83.47 kJ and DG° = 17.5 kJ at 25°C. – A. B. C. D. E. F. Kp = – A. B. C. D. E. F. Kp

asked by Chris on April 27, 2007
science
Is ATP synthesized when chemical bonds between carbon atoms are formed during photosynthesis OR when energy stored in chemical bonds is released during cellular respiration?

asked by ari on February 25, 2007
Science
Cave ecosystems are characterized by extremely low light levels. What role does photosynthesis play in a cave ecosystem? 1: Photosynthesis is essential because it provides the original energy source for all food chains in this ecosystem. 2: photosynthesis

asked by Anonymous on March 15, 2014
Chemistry-Dr.Bob
Since most chemical reactions are conducted in containers open to the armisphere, why is the energy transfer associated with a chemical reaction generally expressed as the change in enthalpy? Is it because the enthalpy of reaction measures the change in

asked by Sanaya on January 10, 2016
Chemistry
What is the difference between a chemical change and a chemical reaction?? My answer: A chemical change leads to a solidifed chemical reaction but more or less they are the same thing because it’s a change in which one or more pure substances are converted

asked by Sam on September 6, 2015
chemistry
Is hydrogen bonding exothermic or endothermic? I am writing a lab report for the reaction between ethanol with water and glycerol with water and I don’t know if the hydrogen bonds formed are exothermic or endothermic… PLEASE HELP!! thanks

asked by anonymous on November 9, 2008
Science
According to the following thermochemical reaction, how much energy is involved in the reaction of 18.5 g of NaHCO3? Is the reaction endothermic or exothermic according to how the thermochemical equation is written? 2NaHCO3(s) + 129 kJ → Na2CO3(s) +

asked by Jenna on May 27, 2014

Chemistry

  1. Write the balanced equation for CH4+Cl2„_CH2Cl2+HCl 4a. For the reaction in problem 4, ƒ´H = -118.3 kcal/mol. Identify whether this is an exothermic or endothermic reaction. Calculate the ƒ´H when 6.00 g of Cl2 are used in the reaction

asked by Kathleen on March 29, 2010
chemistry
a) Describe how to determine if a reaction will be thermodynamically favorable. b) Describe what happens to the Gibbs Free Energy term when a chemical reaction is reversed. c) Describe how coupling reactions are used to drive an unfavorable chemical

asked by Morgan on March 12, 2015
chemistry
Calculate the enthalpy of reaction for the following: N2 + 3H2 -> 2NH3 they are all gases. Is this reaction endothermic or exothermic?

asked by Chioma on November 7, 2011
Chemistry
Predict whether the following reactions will be exothermic or endothermic A.] N2 (g) + 3H2 (g) –> 2NH3 (g) B.] S (g) + O2 (g) –> SO2 (g) C.] 2 H2O (g) –> 2 H2 (g) + O2 (g) D.] 2 F (g) –> F2 (g) Bond ∆H˚ (kJ/mol) H-H _ 432 N(triple)N

asked by Matt on November 9, 2011
chemistry
What is the complete ionic equation for the double displacement reaction: CuNO3(aq) + K2S(aq)= what is the chemical name and formula of this chemical reaction? plsss. need help

asked by shay on October 3, 2012
Chemistry
Answer check: Define a catalyst and explain a catalyst’s role in a chemical reaction. A catalyst is a substance that speeds a chemical reaction without being permanently changed itself. It works by providing a convenient surface for the reaction to occur.

asked by Lauren on January 14, 2008
Chemistry
Write the balanced chemical reaction (showing appropriate symbols and states) for the chemical reaction with enthalpy change equal to ΔHf° [NH3(g)]

asked by Anonymous on March 24, 2017
Chemistry
Hello, I really don’t understand how to find the grams of moles in some of these reactions. If someone could help I would appreciate it. 1) Balance the following chemical reaction and determine the number of moles of HI produced when 2.33 moles of H2(g)

asked by Anonymous on February 19, 2017
Science
An investigation was conducted to study the effect of the concentration of a reactant on the (trial) time need to complete a chemical reaction. Four trials of the same reaction were performed.In each trial the initial concertration of the reactant was

asked by Dena Cali on February 6, 2007
Chemistry
Ok, so in an when an endothermic reaction occurs, is it hot or cold? and why? Also what is it for an exothermic reaction? Thank you

asked by K on May 31, 2013

Chemistry
Ok, so in an when an endothermic reaction occurs, is it hot or cold? and why? Also what is it for an exothermic reaction? Thank you

asked by K on May 31, 2013
chemistry
Given the reaction 1/2 N2( g) + 3/2 H2 (g) _> NH3 (g) +11.0kcal.Is this reaction exothermic or endothermic?

asked by faisal on April 8, 2012
Science
What is the cell structure involved in photosynthesis and respiration? What is the starting materials and raw materials of photosynthesis and respiration? What is the end product of photosynthesis and respiration? What is the energy requirement of

asked by ANON 🙂 on September 14, 2014
Chemistry
Name four factors that can affect the rate of a chemical reaction. How does the rate of a chemical reaction change in response to a change in each factor? My answer: Four factors that can affect the rate of a chemical reaction are concentration, surface

asked by Anonymous on October 11, 2010
Science Help!
Which of the following is true about photosythesis? A. It is an exothermic reaction B. It is an endothermic reaction C. It produces carbon dioxide D. It occurs in animals Is the answer C? Thank you

asked by Callie on November 12, 2014

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