When are reactions always spontaneous?

A) when the reaction is endothermic and the entropy is decreasing at a low temperature

B) when the reaction is exothermic and the entropy is increasing at a high temperature

C) when the reaction is endothermic and the entropy is increasing at a high temperature

D) when the reaction is exothermic and the entropy is decreasing at a low temperature

Question

Chemistry

Londyn Kramer

15 June, 11:15

When are reactions always spontaneous?

A) when the reaction is endothermic and the entropy is decreasing at a low temperature

B) when the reaction is exothermic and the entropy is increasing at a high temperature

C) when the reaction is endothermic and the entropy is increasing at a high temperature

D) when the reaction is exothermic and the entropy is decreasing at a low temperature

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Answers (1)

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Ellie Mcclure · Answer 1

A spontaneous process is the time-evolution of a system in which it releases free energy and moves to a lower, more thermodynamically stable energy state. 12The sign convention of changes in free energy follows the general convention for thermodynamic measurements, in which a release of free energy from the system corresponds to a negative change in free energy, but a positive change for the surroundings.