4. Решение задачки по химии №21

2. Calculate the standard enthalpy of formation of copper(II) chloride using the information about the heat effects of the following thermochemical equations:
CuO 2HClaq=CuCl2 H2 H2ΔH1=−63.93 kJ;
CuCl2aq=CuCl2 ΔH2=−46.39 kJ;
Cu 1/2O2=CuO ΔH3=−157 kJ;
H2 Cl2=2HClaq ΔH4=−329.08 kJ;
H2 1/2O2=H2O ΔH5=−286 kJ.

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