题目内容

下列关于热化学反应的描述中正确的是

2021-09-23

A.已知H+(aq)+OH-(aq)=H2O(1)；ΔH=-57.3kJ·mol-1，则H2SO4和Ba(OH)2反应的反应热ΔH=2×（-57.3）kJ·mol-1

B.燃料电池中将甲醇蒸气转化为氢气的热化学方程式是CH3OH(g)+1/2O2(g)=CO2(g)+ 2H2(g)；ΔH=-192.9 kJ·mol-1，则CH3OH的燃烧热为192.9 kl·mol-1

C.H2(g)的燃烧热是285.8 kJ·mol -1，则2H2O(g)=2H2(g)+O2(g); ΔH =" +571.6" kJ·mol -1

D.葡萄糖的燃烧热是2 800 kJ·mol -1，则l／2C6H12O6(s)+3O2(g)=3CO2(g)+3H2O(1)；ΔH =-1400 kJ·mol-1

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