已知在25.101Kpa下.1g C8H18燃烧生成二氧化碳和液态水时放出48.40KJ热量.则表示上述反应的热化学方程式正确的是 ( ) A. 2C8H18(l)+25O2(g)=16CO2(g)+18H2O(g),△H =-96.80KJ/mol B. 2C8H18(l)+25O2(g)=16CO2(g)+18H2O(l),△H =-11035.20KJ/mol C. 2C8H18(g)+25O2(g)=16CO2(g)+18H2O(l),△H =+11035.20KJ/mol D. 2C8H18(l)+25O2(g)=16CO2(g)+18H2O(g),△H =-96.80KJ/mol 查看更多

 

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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的热量。表示上述反应的热化学方程式正确的是(    )

A. C8H18(l)+25/2O2(g)=8CO2(g)+9H2O(g)  △H=-48.40kJ·mol-1

B. C8H18(l)+25/2O2(g)=8CO2(g)+9H2O(l)  △H=-5518kJ·mol-1

C. C8H18(l)+25/2O2(g)=8CO2(g)+9H2O  △H=+5518kJ·mol-1

D. C8H18(l)+25/2O2(g)=8CO2(g)+9H2O(l)  △H=-48.40kJ·mol-1

 

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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。则表示上述反应的热化学方程式正确的是                          

A. 2C8H18(l)+25O2(g)=16CO2(g)+18H2O(g);△H =-96.80KJ/mol

B. 2C8H18(l)+25O2(g)=16CO2(g)+18H2O(l);△H =-11035.20KJ/mol

C. 2C8H18(g)+25O2(g)=16CO2(g)+18H2O(l);△H =+11035.20KJ/mol

D. 2C8H18(l)+25O2(g)=16CO2(g)+18H2O(g);△H =-96.80KJ/mol

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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

 

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