題目列表(包括答案和解析)
已知在25℃,101kPa下,lgC8H18(辛烷)燃燒生成二氧化碳和液態(tài)水時放出48.40kJ熱量。表示上述反應(yīng)的熱化學(xué)方程式正確的是( )
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
已知在25℃,101kPa下,lgC8H18(辛烷)燃燒生成二氧化碳和液態(tài)水時放出48.40kJ熱量。表示上述反應(yīng)的熱化學(xué)方程式正確的是
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
已知在25℃,101kPa下,lgC8H18(辛烷)燃燒生成二氧化碳和液態(tài)水時放出48.40kJ熱量。表示上述反應(yīng)的熱化學(xué)方程式正確的是( )
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
已知在25℃,101kPa下,lgC8H18(辛烷)燃燒生成二氧化碳和液態(tài)水時放出48.40kJ熱量。表示上述反應(yīng)的熱化學(xué)方程式正確的是
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
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