Problem set 1 Reaction 1: CH206 +602 6H2O+6CO2 I. Is ?G positive or negative for
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Question
Problem set 1 Reaction 1: CH206 +602 6H2O+6CO2 I. Is ?G positive or negative for this reaction? Explain your answer. Look to see what is happening in the reaction - is something complex being broken down into simpler things (which gives off energy), or are simpler things being put together into more complex molecules (which requires energy) Is this reaction exergonic or endergonic? (Remember that if ?G 0, then the reaction is endergonic and not spontaneous) Explain your answer. 2. 3. Is this reaction spontaneous? Reaction 2: I. Is ?G positive or negative? 2. Is this reaction exergonic or endergonic? 3. Is this reaction spontaneous?Explanation / Answer
Problem set 1
Reaction 1
Answer 1. Delta G is negative in this reaction. It is an example of the catabolic reaction, Respiration. Catabolic reaction releases energy and tends to occur on their own. Thus, these are exergonic and spontaneous.
Answer 2. The reaction is exergonic and spontaneous because delta G is negative. The condition is as such because the energy is provided by the reactants itself, no energy is required from outside.
Answer 3. Yes, the reaction is spontaneous. All the exergonic reactions are spontaneous. Means all the reactions that releases energy and occur in their own.
Reaction 2
Answer 1. Delta G is positive in the given reaction. It is an Anabolic reaction showing photosynthesis. In them, delta G is positive mostly.
Answer 2. The reaction is endergonic means it will require energy to go on.
Answer 3. No, the reaction is not spontaneous. Because it cannot happen on its own. In photosynthesis reaction, energy is provided by the sunlight to make this reaction spontaneous.
Gibbs free energy problems:
Answer 1.
Convert Fahrenheit to Celsius. Then to kelvin
68 degree fahrenheit to 20 celsius
Kelvin = 20 + 273 = 293 K
Putting values into the gibbs free energy formula:
Delta G = 19070 - (293 X 90)
Delta G = - 7300 cal
Answer 2.
68 fahrenheit = 20 celsius means 20 + 273 = 293 kelvin
Putting values into free energy formula we get
Delta G= 4103- (293 * 2.4)
Delta G = 3399.8 cal
Answer 3. Reaction 1 will occur spontaneously means the one in which breakdown of ATP has been shown. Because the delta G is negative in this, all the reactions that have delta G negative they are spontaneous and exergonic.
Answer 4. Glutamate reaction is endergonic. It will require energy to go on. Delta G is positive in this reaction.
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