25℃,101 kPa时,强酸与强碱的稀溶液发生中和反应的中和热为57.3 kJ/mol,辛烷的燃烧热为5518 kJ/mol.下列热化学方程式书写正确的是
A.2H+(aq)+SO42—(aq)+Ba2+(aq)+2OH-(aq)===BaSO4(s)+2H2O(l);ΔH=-57.3 kJ/mol |
B.KOH(aq)+1/2H2SO4(aq)===1/2K2SO4(aq)+H2O(l);ΔH=-57.3 kJ/mol |
C.C8H18(l)+25/2O2(g)===8CO2(g)+9H2O(g);ΔH=-5518 kJ/mol |
D.2C8H18(g)+25O2(g)===16CO2(g)+18H2O(l);ΔH=-5518 kJ/mol |