The expression for finding G f for a formation reaction is G° f = H° f TS°. Whic

Question

The expression for finding Gf for a formation reaction is G°f = H°f TS°. Which statement about Gf is not correct? A) Like Hf, Gf for a reaction is not very sensitive to changes in temperature. B) Gf is defined for 1 mol of substance at 1 atm. C) Gf for the formation of a compound is the G for the reaction of the product being formed from the elements. D) We do not have to use S°f for the Gf expression because we can use absolute entropy values for compounds. The expression for finding Gf for a formation reaction is G°f = H°f TS°. Which statement about Gf is not correct?

Explanation / Answer

A) Like Hf, Gf for a reaction is not very sensitive to changes in temperature. FALSE, they are direclty related to T

B) Gf is defined for 1 mol of substance at 1 atm. TRUE

C) Gf for the formation of a compound is the G for the reaction of the product being formed from the elements. FALSE, since those will have 0 value

D) We do not have to use S°f for the Gf expression because we can use absolute entropy values for compounds. FALSE, we do use them

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