已知在25℃,101kPa下,lgC
8 H
18 (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.C 8 H 18 (1)+12.5O 2 (g)=8CO 2 (g)+9H 2 O(g) ∆H=-48.40kJ/mol |
B.C 8 H 18 (1)+12.5O 2 (g)=8CO 2 (g)+9H 2 O(1) ∆H=-5518kJ/mol |
C.C 8 H 18 (1)+12.5O 2 (g)=8CO 2 (g)+9H 2 O(1) ∆H=+5518kJ/mol |
D.C 8 H 18 (1)+12.5O 2 (g)=8CO 2 (g)+9H 2 O(1) ∆H=-48.40kJ/mol |