題目列表(包括答案和解析)
A.C8H18(l)+O2(g)==8CO2(g)+?9H2O(g)? ΔH ="-48.40" kJ·mol-1 |
B.C8H18(l)+O2(g)==8CO2(g)+9H2O(l)?ΔH="-5" 518 kJ·mol-1 |
C.C8H18(l)+O2(g)==8CO2(g)+?9H2O(l)? ΔH ="+5" 518 kJ·mol-1 |
D.C8H18(l)+O2(g)==8CO2(g)+?9H2O(l)? ΔH ="-48.40" kJ·mol-1 |
已知在25 ℃、101 kPa下,1 g C8H18(辛烷)燃燒生成二氧化碳和液態(tài)水時(shí)放出48.40 kJ熱量,表示上述反應(yīng)的熱化學(xué)方程式正確的是( )
A.C8H18(l)+O2(g)==8CO2(g)+?9H2O(g)? ΔH ="-48.40" kJ·mol-1 |
B.C8H18(l)+O2(g)==8CO2(g)+9H2O(l)?ΔH="-5" 518 kJ·mol-1 |
C.C8H18(l)+O2(g)==8CO2(g)+?9H2O(l)? ΔH ="+5" 518 kJ·mol-1 |
D.C8H18(l)+O2(g)==8CO2(g)+?9H2O(l)? ΔH ="-48.40" kJ·mol-1 |
已知在25℃、101 kPa下,1g C8H18(辛烷)燃燒生成二氧化碳和液態(tài)水時(shí)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(l)+22.5O2(g)=8CO2(g)+9H2O(g),DH=-48.40kJ.mol-1
B.C8H18(l)+22.5O2(g)=8CO2(g)+9H2O(l),DH=-5518kJ.mol-1
C.C8H18(l)+22.5O2(g)=8CO2(g)+9H2O(l),DH=+5518kJ.mol-1
D.C8H18(l)+22.5O2(g)=8CO2(g)+9H2O(l),DH=-48.40kJ.mol-1
A.C8H18(l)+22.5O2(g)=8CO2(g)+9H2O(g),DH=-48.40kJ.mol-1
B.C8H18(l)+22.5O2(g)=8CO2(g)+9H2O(l),DH=-5518kJ.mol-1
C.C8H18(l)+22.5O2(g)=8CO2(g)+9H2O(l),DH=+5518kJ.mol-1
D.C8H18(l)+22.5O2(g)=8CO2(g)+9H2O(l),DH=-48.40kJ.mol-1
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