We can use the following equation to solve for ΔS˚rxn:
Note that we need to multiply each S˚ by the stoichiometric coefficient since S˚ is in J/mol • K.
The given reaction is 2H2(g)+O2(g)→2H2O(l)
S° H2O(g) = 130.6 J/(K•mol)
S° O2(g) = 205.0 J/(K•mol)
S° H2O(l) = 69.90 J/(K•mol)
Calculate the standard entropy change for the reaction 2H2(g)+O2(g)→2H2O(l) using the data from the following table:
|Substance||ΔH°f (kJ/mol)||ΔG°f (kJ/mol)||S° [J/(K•mol)]|
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