Question

# a. Which$K _ { \mathrm { eq } }$corresponds to a negative value of$\Delta G ^ { \circ } , K _ { \mathrm { eq } } = 1 0 0 0 \text { or } K _ { \mathrm { eq } } = . 0 0 1 ?$b. Which$K _ { \mathrm { eq } }$corresponds to a lower value of$\Delta G ^ { \circ } , K _ { \mathrm { eq } } = 1 0 ^ { - 2 } \text { or } K _ { \mathrm { eq } } = 1 0 ^ { - 5 } ?$

Solution

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In order to solve this task, we have to follow this equation:

$\textcolor{#4257b2}{\Delta G^0 = -2.303 RT \log K_{eq}}$

If we observe the equation shown above, we can see that an interesting part of the equation is going to be logK$_{eq}$.

If K$_{eq}$ value is bigger than 1 (K$_{eq}$ > 1), logarithm is going to have positive value so $\textcolor{#4257b2}{\Delta G^0}$ is going to be negative.

And vice versa, if the K$_{eq}$ value is smaller than 1 (K$_{eq}$ < 1), logarithm is going to have negative value so $\textcolor{#4257b2}{\Delta G^0}$ is going to be positive.

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