H2+1/2O2=H2O Q=-242KJ (1)
O2=2O Q=469KJ (2)
2H+O=H2O Q=-(2X463)KJ (3)
H2=H+H Q=?(4)
因(1)=1/2(2)+(3)+(4)则可以解得
Q=-242-469/2+2X463=449.5KJ
H2+1/2O2=H2O Q=-242KJ (1)
O2=2O Q=469KJ (2)
2H+O=H2O Q=-(2X463)KJ (3)
H2=H+H Q=?(4)
因(1)=1/2(2)+(3)+(4)则可以解得
Q=-242-469/2+2X463=449.5KJ