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Calculate ΔH° for the combustion of methane (products are CO2(g) and H2O(l)), given the following thermochemical...

Calculate ΔH° for the combustion of methane (products are CO2(g) and H2O(l)), given the following thermochemical equations:

CH4(g) + O2(g) →CH2O(g) + H2O(g) ΔH = -284 kJ

CH2O(g) + O2(g) →CO2(g) + H2O(g) ΔH = -518 kJ

H2O(g) →H2O(l) ΔH = +44 kJ

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