题目内容
|
已知在25℃，101kPa下，lgC8H18(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(1)＋12.5O2(g)＝8CO2(g)＋9H2O(g)；△H＝－48.40kJ·mol－1 |
B． |
C8H18(1)＋12.5O2(g)＝8CO2(g)＋9H2O(1)；△H＝－5518kJ·mol－1 |
C． |
C8H18(1)＋12.5O2(g)＝8CO2(g)＋9H2O(1)；△H＝＋5518kJ·mol－1 |
D． |
C8H18(1)＋12.5O2(g)＝8CO2(g)＋9H2O(1)；△H＝－48.40kJ·mol－1 |
答案：B
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