下面均是正丁烷与氧气反应的热化学方程式(25°,101kPa): ①C4H10(g)+O2(g)=4CO2(g)+5H2O(l)△H=-2878kJ/mol ②C4H10(g)+O2(g)=4CO2(g)+5H2O(g)△H=-2658kJ/mol ③C4H10(g)+O2(g)=4CO(g)+5H2O(l)△H=-1746kJ/mol ④C4H10(g)+O2(g)=4CO(g)+5H2O(g)△H=-1526kJ/mol 由此判断,正丁烷的燃烧热是( )A.-2878kJ/mol | B.-2658kJ/mol | C.-1746kJ/mol | D.-1526kJ/mol |
|