During which phase change does the entropy of a sample of H2O increase?

January 2019 NY Regents Chemistry Exam

42 During which phase change does the entropy of a sample of H2O increase? (1) H2O(g) → H2O(l)

(2) H2O(g) → H2O(s)

(3) H2O(l) → H2O(g)

(4) H2O(l) → H2O(s)

Solution: Entropy is a measure of the disorder. Gas (g) has the higher entropy followed by liquid(l) and finally solid (s).

Answer: 3

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