### (a) Find $\Delta S_{\mathrm{rxn}}^{\circ}$ for th…

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Problem 39

(a) Find $\Delta S_{\text { rxn }}^{\circ}$ for the formation of $\mathrm{Cu}_{2} \mathrm{O}(s)$ from its elements.
(b) Calculate $\Delta S_{\text { univ }}$ , and state whether the reaction is spontaneous at 298 $\mathrm{K} .$

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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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