32. Solving a chemistry problem
59. According to the given thermochemical equations, calculate the standard enthalpy of the reactions of formation of these complex substances:
Ca(t) 1/5O2(g)=CaO(g) -635.6 kJ CaC2
CaO(t) 3C(t)=CaC2(t) CO(g) 460kJ
C(t) 1/2O2(g)=CO(g) -110 kJ
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