在25℃、101kPa下,1g甲醇燃烧生成CO2和液态水时放热22.68kJ,下列热化

25℃、101kPa下,1g甲醇燃烧生成CO2和液态水时放热22.68kJ,下列热化学方程式正确的是

     

ACH3OHl+O2g    CO2g+2H2Ol  H=+725.8 kJ/mol

B2CH3OHl+3O2g    2CO2g+4H2Ol  H=1452 kJ/mol

C2CH3OHl+3O2g    2CO2g+4H2Ol  H=725.8 kJ/mol

D2CH3OHl+3O2g    2CO2g+4H2Ol  H=+1452 kJ/mol

答案

B

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