Problem: Use the standard entropy data in Appendix G to determine the change in entropy for each of the reactions listed below. All the processes occur at the standard conditions and 25 °C.(e) CH4(g) + O2(g) ⟶ C(s, graphite) + 2H 2O(g)

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 We can use the following equation to solve for ΔS˚rxn:


ΔS°rxn=S°f, prod-S°f, react


Note that we need to multiply each S˚ by the stoichiometric coefficient since S˚ is in J/mol • K.


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Use the standard entropy data in Appendix G to determine the change in entropy for each of the reactions listed below. All the processes occur at the standard conditions and 25 °C.


(e) CH4(g) + O2(g) ⟶ C(s, graphite) + 2H 2O(g)

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