Difference Between the Gibbs Free Energy and the Enthalpy

Calculate the magnitude of the difference between the Gibbs free energy and the Enthalpy at 25o C for the reaction
H2 (g, 1 bar) + 1/2 O2 (g,1 bar) -> H2O(liq,1 bar)
in kJ per mole of liquid water. The standard Entropies of Formation of (g,1 bar) = 205.138 J/(mole K), of (g,1 bar) = 130.684 J/(mole K) and (liq, 1 bar) = 69.91 J/(mole K).

Choose your answer in scientific notation, i.e., ± x.yzE{± ab}, and then press the 'Submit the above answer' button (below).

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Carl W. David
Department of Chemsitry
University of Connecticut
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