Answer to Question #179260 in General Chemistry for johanna

Question

How much heat is produced by the complete reaction of 4.47 kg

of nitromethane?

Answer 1

The molar mass of nitromethane,$m= (12+3(1) +14+2(16)) g/mol$ =

61g/mol

Thus, the number of moles n in 5.56 kg of nitromethane is:

$n =4470/61$ =73.28moles

Nitromethane (CH3NO2) burns in air to produce significant amounts of heat.

2CH3NO2(l)+3/2O2(g)>2CO2(g)+3H2O(l)+N2(g) = -1418 kJ

According to the equation,

2 moles of nitromethane on combustion gives 1418 kJ of heat.

Thus, the heat produced by the combustion of 73.28 moles of nitromethane:

Heat produced=$\frac{1418}{2} × 73.28 = 51955.52J$