The heats of reaction for the following combustion reactions were determined experimentally: C2H4(g) + 3 O2(g) ? 2 CO2(g) + 2 H2O(?) ?H = -1411.1 kJ C2H5OH(?) + 3 O2(g) ? 2 CO2(g) + 3 H2O(?) ?H = -1367.5 kJ Considerig the above reactions, what is the heat of reaction for the synthesis of thanol from ethylene and water: C2H4 + H2O(?) ? C2H5OH(?) ?H = ?