Determine the Heat of Reaction for the Combustion of Ammonia

question 28

Multiple Choice

Determine the heat of reaction for the combustion of ammonia,
4NH3(g) + 7O2(g) ? 4NO2(g) + 6H2O(l) using molar enthalpies of formation.
$\begin{array}{ll}\text { molecule } & \Delta f H^{\circ}(\mathrm{kJ} / \mathrm{mol}) \\\hline \mathrm{NH}_{3}(g) & -45.9 \\\mathrm{NO}_{2}(g) & +33.1 \\\mathrm{H}_{2} \mathrm{O}(l) & -285.8\end{array}$

• A) +30.24 kJ
• B) -206.9 kJ
• C) -298.6 kJ
• D) -1398.8 kJ
• E) -1663.6 kJ

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