17. Determine the enthalpy of the reaction CH4 (g) Cl2 (g) = CH3Cl (g) HCl (g), knowing the enthalpies of the following reactions:
CH3C1 (g) 3 / 2O2 (g) \u003d CO2 (g) H2O (l) HCl (g) ΔH ° \u003d - 687.0 kJ / mol
H2 (g) 1/2O2 (g) = H2O (g) ΔH° = - 286 kJ/mol
1/2H2 (g) 1/2C12 (g) = HC1 (g) ΔH° = - 92.5 kJ/mol
CH4(g) 2O2(g) = CO2(g) 2H2O(g) ΔH° = 890.8 kJ/mol

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