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A . HCl和NaOH反应的中和热△H=-57.3 kJ/mol
B . 甲烷的标准燃烧热△H=- 890.3 kJ/mol,则CH4(g) +2O2(g) =CO2(g)+2H2O(g) △H<-890.3 kJ/mol
C . 500℃、30 MPa下,N2(g)+3H2(g) 2NH3(g) △H = -92.4kJ/mo1, 将1.5 mol H2和过量的N2在此条件下充分反应,放出热量46.2 kJ
D . CO(g)的燃烧热是283.0 kJ/mol,则2CO2(g)=2CO(g)+O2(g)的△H=+566.0 kJ/mol
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