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1. In which of the reactions below is H an enthalpy of formation? (a) S8(s) +...

1. In which of the reactions below is H an enthalpy of formation? (a) S8(s) + 8O2(g)  8SO2(g) (b) CaO(s) + H2O(l)  Ca(OH)2(s) (c) Cu(s) 1/2I2(s)  CuI(s) (d) 1/2H2(g) + 1/2Cl2(g) + 2O2(g)  HClO4(l) (e) both c and d are enthalpies of formation

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