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Problem 29

Without consulting Appendix $\mathrm{B}$ , arrange each group in order of decreasing standard molar entropy $\left(S^{\circ}\right) .$ Explain.
(a) Mg metal, Ca metal, Ba metal
(b) Hexane $\left(\mathrm{C}_{6} \mathrm{H}_{14}\right),$ benzene $\left(\mathrm{C}_{6} \mathrm{H}_{6}\right),$ cyclohexane $\left(\mathrm{C}_{6} \mathrm{H}_{12}\right)$
(c) $\mathrm{PF}_{2} \mathrm{Cl}_{3}(g), \mathrm{PF}_{5}(g), \mathrm{PF}_{3}(g)$

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Chapter 20
Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions
CHEMISTRY: The Molecular Nature of Matter and Change 2016

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