Consider a generic first order redox reaction at 300 K: AB_2 (aq) rightwardsover
ID: 535276 • Letter: C
Question
Consider a generic first order redox reaction at 300 K: AB_2 (aq) rightwardsoverleftwardsarrow A (aq) + B_2 (aq). Imagine you start with only reactants. As this reaction proceeds, predict what will happen to each of the following. Assume the temperature is held constant. Q will: A) Increase B) Stay constant C) Decrease D) Not enough info to predict. The rate will: A) Increase B) Stay constant C) Decrease D) Not enough info to predict. delta G degree will: A) Not enough info to predict. B) Increase C) Stay constant D) Decrease E degree will: A) Increase B) Stay constant C) Decrease D) Not enough info to predict. K_eq will: A) Increase B) Stay constant C) Decrease D) Not enough info to predict. The rate constant, k, will: A) Increase B) Stay constant C) Decrease D) Not enough info to predict. delta G will: A) Increase B) Stay constant C) Decrease D) Not enough info to predict. E will: A) Increase B) Stay constant C) Decrease D) Not enough info to predict.Explanation / Answer
20) The answer is A) Increase
Q= [ A ] [ B2 ]/[AB2]
As the reaction proceeds [ A ] and [ B2 ] increases but [ AB2 ] decreases ,so Q will increase
21) The answer is C) decrease
As reaction proceed concentration of reactant will decrease, so rate of reaction will decrease
22) The answer is C) stay constant
G° = -RTlnK
R,T and K(equillibrium constant) are constant , so G° is constant
23) The answer is B) stay constant
E° = - G°/nF
G° , n( No of electron transfer) and F ( Faraday constant) are constant, so E° is constant.
24) The answer is B) stay constant
At constant temperature Keq will be constant
25) The answer is B) stay constant
26) The answer is C) decrease
G= G° + RTlnQ
= - RTlnK + RTlnQ
As the reaction proceed Q increases.So, G decreses
27) The answer is C) decrease
Nernst equation is
E = E° - ( 0.0592/n)logQ
As the reaction proceeds ,Q will decreases.So, from the equation we can understand that E will decrease
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