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CHM 101 CHM 101 Past Questions Objective Question

Question

In which of the following processes does entropy decrease?
Options
A Ice melting
B Water vapor condensing
Correct Answer
C Gas compressing into a smaller volume
D Dissolution of salt in water
Correct Answer

Option B is the correct answer.

Detailed Explanation

Entropy is a measure of disorder. When water vapor condenses into liquid water, the molecules go from a highly disordered, random gaseous state to a more ordered liquid state, resulting in a decrease in entropy.

Hint

Which process leads to a more ordered state (less randomness)?

Question Info