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 P: 10 If you know $E$, then you can calculate $\Delta G$, as you have done already. You also know that $\Delta G = \Delta H - T \Delta S$. But, this leaves you with two unknowns. Perhaps you can calculate some more values of $\Delta G$, and then solve for $\Delta H$ and $\Delta S$? Hint: they've given you a piece of information that you haven't needed to use yet :)