Top fuel dragsters and funny cars burn nitro-methane as fuel according to the following balanced combustion equation: 2ch3no2(l)+3/2o2(g)→2co2(g)+3h2o(g) +n2(g). the standard enthalpy of combustion for nitromethane is −709.2kj/mol. calculate the standard enthalpy of formation(delta h formation) for nitro-methane.
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![\Delta H^o_{rxn}=\sum [n\times \Delta H^o_f(product)]-\sum [n\times \Delta H^o_f(reactant)]](/tpl/images/0475/2966/45485.png)
![\Delta H^o_{rxn}=[(n_{(CO_2)}\times \Delta H^o_f_{(CO_2)})+(n_{(H_2O)}\times \Delta H^o_f_{(H_2O)})+(n_{(N_2)}\times \Delta H^o_f_{(N_2)})]-[(n_{(CH_3NO_2)}\times \Delta H^o_f_{(CH_3NO_2)})+(n_{(O_2)}\times \Delta H^o_f_{(O_2)})]](/tpl/images/0475/2966/ea72d.png)
![-709.2=[(2\times -393)+(3\times -286)+(1\times 0)]-[(2\times \Delta H^o_f_{(CH_3NO_2)})+(\frac{3}{2}\times 0)]](/tpl/images/0475/2966/4d16f.png)
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