JAMB Chemistry 2021 Objective — Question 16

Question 16 of 41 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2021 Objective paper, with the correct answer and a full explanation.

For a reaction to be spontaneous, which of the following is required?

A. ΔH should exceed TΔS
B. TΔS should exceed ΔHCorrect
C. TΔS and ΔH should be equal
D. ΔG should be positive

Explanation

ΔG = ΔH − TΔS. For spontaneity, ΔG < 0. This requires TΔS > ΔH (so that ΔH − TΔS < 0).

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