Which one of the following is always positive when a spontaneous process occurs?

Question

Quizplus · Accepted Answer

ΔS is the change in entropy, which is a measure of the amount of disorder or randomness in a system. A spontaneous process is one that results in an increase in entropy, i.e. ΔS > 0. Since the universe includes both the system and the surroundings, the change in entropy of the universe will also be greater than zero, hence choice C is always positive. ΔH is the change in enthalpy, which is a measure of the heat absorbed or released by a system, and is not necessarily positive for a spontaneous process.

Which One of the Following Is Always Positive When a Spontaneous