题目内容
燃烧10g CH4生成液态水和气态CO2，放出556.5kJ的热量，以下的热化学方程式正确的是
A．CH4(g)＋2O2(g)=CO2(g)＋2H2O(l) ΔH＝55.65kJ/mol
B．CH4(g)＋2O2(g)=CO2(g)＋2H2O(l) ΔH＝－55.65kJ/mol
C．CH4(g)＋2O2(g)=CO2(g)＋2H2O(l) ΔH＝－890.4kJ/mol
D．CH4(g)＋2O2=CO2＋2H2O ΔH＝890.4kJ/mol
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