Xem(a) State the first and second laws of thermodynamics and discuss their use in predicting whether a chemical reaction can occur spontaneously. (b) Use the enthalpies of formation at pH 7 given below to calculate AH° for the hydrolysis of the amide bond in the dipeptide Gly-Gly. \text { Gly }-\text { Gly }+\mathrm{H}_{2} \mathrm{O} \rightleftharpoons 2 \text { Gly }

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