已知在25℃,101KPa下,1g C8H18(辛烷)燃烧生成二氧化碳和液态水时放出48.40KJ热量。表示上述反应的热化学方程式正确的是
A.C8H18(l)+12.5O2(g)="=" 8CO2(g)+ 9H2O(g)ΔH= —48.40KJ/mol |
B.C8H18(l)+12.5O2(g)="=" 8CO2(g)+ 9H2O(l)ΔH= —5518KJ/mol |
C.C8H18(l)+12.5O2(g)="=" 8CO2(g)+ 9H2O(l)ΔH= +5518KJ/mol |
D.C8H18(l)+12.5O2(g)="=" 8CO2(g)+ 9H2O(l)ΔH= —48.40KJ/mol |