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Solution entropy

by Big-Daddy
Tags: entropy, solution
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Jan8-14, 07:47 PM
P: 343
Normally due to H+ being the reference state in solution, all 'standard molar' state variables and 'standard value of formation' state variables are 0 for it. But H2(g) has a standard enthalpy of formation = 0 and standard molar entropy of 115 Jmol-1K-1. Then shouldn't ΔG(298) for the reaction

2H+(aq) + 2e- = H2(g)

be -34,720 J and K = 1 * 106, E=+0.1799?

But I thought according to electrochemistry that E=ΔG=0 for this reaction and thus K=1.
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