A chemical reaction with a negative enthalpy change and a negative entropy change ________.
A)must be spontaneous
B)must be nonspontaneous
C)could be either spontaneous or nonspontaneous depending on the temperature
D)is not possible

Question

Quizplus · Accepted Answer

A chemical reaction with a negative enthalpy change (ΔH < 0) and a negative entropy change (ΔS < 0) could be spontaneous at low temperatures but nonspontaneous at high temperatures. The spontaneity depends on the Gibbs free energy change (ΔG = ΔH - TΔS), which can vary with temperature.

A Chemical Reaction with a Negative Enthalpy Change and a Negative