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Relationship between K and G

Posted: Thu Mar 15, 2018 5:43 pm
by Christina Cen 2J
Why is it that when K<1, G is + and when K>1, G is -? I know that this is because of the equation G = -RTlnK, but what does it mean conceptually?

Re: Relationship between K and G

Posted: Thu Mar 15, 2018 10:50 pm
by Sarah Rutzick 1L
Why is it that when K<1, G is + and when K>1, G is -? I know that this is because of the equation G = -RTlnK, but what does it mean conceptually?
When K is less than 1, reactants are more favored in the reaction than products. Therefore, G is not spontaneous (positive) because spontaneous forward reactions favor products and occur naturally. So then when K is greater than 1, products are favored and G is spontaneous (negative).