25℃、101kPa下,2g氢气燃烧生成液态水,放出285.8kJ热量,表示该反应的热化学方程式正确的是
A.2H2(g)+O2(g)=2H2O (l)△H=-285.8 kJ·mol-1 |
B.2H2(g)+O2(g)=2H2O (l)△H=+571.6 kJ·mol-1 |
C.2H2(g)+O2(g)=2H2O (g)△H=-571.6 kJ·mol-1 |
D.H2(g)+1/2O2(g)=H2O (l)△H=-285.8 kJ·mol-1 |
25℃、101kPa下,2g氢气燃烧生成液态水,放出285.8kJ热量,表示该反应的热化学方程式正确的是
A.2H2(g)+O2(g)=2H2O (l)△H=-285.8 kJ·mol-1 |
B.2H2(g)+O2(g)=2H2O (l)△H=+571.6 kJ·mol-1 |
C.2H2(g)+O2(g)=2H2O (g)△H=-571.6 kJ·mol-1 |
D.H2(g)+1/2O2(g)=H2O (l)△H=-285.8 kJ·mol-1 |
试题篮
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