How does G° change for every increase in Keq by an order of magnitude? A- G° dec

Question

How does G° change for every increase in Keq by an order of magnitude?

A- G° decreases but not in a predictable way.

B- None of the other statements is a reasonable description of the relationship between G° and Keq.

C- G° decreases by ~1.4 kcal/mol for each order of magnitude increase in Keq.

D- G° decreases by ~5.5 kcal/mol for each order of magnitude increase in Keq.

E- G° increases but not in a predictable way.

F- G° increases by ~5.5 kcal/mol for each order of magnitude increase in Keq.

H- G° increases by ~1.4 kcal/mol for each order of magnitude increase in Keq.

Explanation / Answer

G° = - RTlnK

G° = - RT x 2.303 log K

G° = - 2 x 298 x 2.303 x log K

G° = - 1.3725 log K = - 1.4 Log K kcal/mol(approximately)

Hence the answer is

(C) decreases by approximately 1.4 k cal / mol for each order of magintude increase in Keq.

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