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 | |
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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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