摘要：下列热化学方程式中ΔH的绝对值能表示可燃物的燃烧热的是: A．H2 (g) + 1/2O 2(g) = H2O (g), ΔH= -241.8 kJ/mol B．CH4(g) + 2O2(g) = CO2(g) + 2 H2O(g),ΔH= -802.3 kJ/mol C．2H2(g) + O2(g) = 2 H2O(l), ΔH= -571.6 kJ/mol D．CO(g) + 1/2O2(g)= CO2(g), ΔH= -283 kJ/mol

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