Question

Are chemical reactions always spontaneous when ΔH is negative and ΔS is negative?

Answer 1

When ΔH is negative and ΔS is positive, the sign of ΔG will always be negative, and the reaction will be spontaneous at all temperatures. ... Therefore, as the temperature increases, the TΔS term in the Gibbs free energy equation will begin to predominate and ΔG will become negative.

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