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Calculate the standard entropy change for the following reaction at 25 °C.

2 Al (s) + 3 ZnO (s) --> Al2O3 (s) + Zn (s) answer is in J/K mol

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dSf rxn = (n*dSf products) - (n*dSf reactants)
Look up the S values in tables in your text/notes, substitute, and solve for dS rxn

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