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题文

下列说法正确的是

A.HCl和NaOH反应的中和热△H=-57.3kJ/mol,则1mol H2SO4和1mol Ca(OH)2反应的中和热△H=2×(-57.3)kJ/mol
B.CO(g)的燃烧热是283.0kJ/mol,则2CO2(g)= 2CO(g)+O2(g)反应的△H=+(2×283.0)kJ/mol
C.需要加热才能发生的反应一定是吸热反应
D.1mol甲烷燃烧生成气态水和二氧化碳所放出的热量是甲烷的燃烧热
科目 化学   题型 选择题   难度 中等
知识点: 乙炔的燃烧
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