25℃、101 kPa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(1)△H= ―285.8kJ/mol |
B.2H2(g)+ O2(g)=2H2O(1)△H=" +571.6" kJ/mol |
C.2H2(g)+O2(g)=2H2O(g)△H=" ―571.6" kJ/mol |
D.H2(g)+O2(g)=H2O(1)△H = ―285.8kJ/mol |
25℃、101 kPa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(1)△H= ―285.8kJ/mol |
B.2H2(g)+ O2(g)=2H2O(1)△H=" +571.6" kJ/mol |
C.2H2(g)+O2(g)=2H2O(g)△H=" ―571.6" kJ/mol |
D.H2(g)+O2(g)=H2O(1)△H = ―285.8kJ/mol |