Arrange these compounds in order of increasing standard molar entropy at 25^$\circ$C: C₃H₈(g), C₂H₄(g), ZnS(s), and H₂O(l). A) ZnS(s)

Question

Arrange these compounds in order of increasing standard molar entropy at 25^$\circ$C: C₃H₈(g), C₂H₄(g), ZnS(s), and H₂O(l). A) ZnS(s) < H₂O(l) < C₃H₈(g) < C₂H₄(g) B) C₂H₄(g) < H₂O(l) < C₃H₈(g) < NaCl(s) C) ZnS(s) < C₃H₈(g) < C₂H₄(g) < H₂O(l) D) C₃H₈(g) < C₂H₄(g) < H₂O(l) < ZnS(s) E) ZnS(s) < H₂O(l) < C₂H₄(g) < C₃H₈(g)

Quizplus · Accepted Answer

Entropy generally increases from solids to liquids to gases, and among gases, it increases with molecular complexity and mass. ZnS (solid) has the lowest entropy, followed by H2O (liquid), then CH4 (simple gas), and finally C2H6 (more complex gas).

Arrange These Compounds in Order of Increasing Standard Molar Entropy ∘\circ∘

Arrange These Compounds in Order of Increasing Standard Molar Entropy $\circ$