The synthesis of ammonia is represented by

CHEMISTRY · Single correct · A Level · Chemistry · Energetics · Energetics

Problem

\mathrm{N_2(g)} + 3\,\mathrm{H_2(g)} \rightarrow 2\,\mathrm{NH_3(g)}

. The standard enthalpy of formation of

\mathrm{NH_3(g)}

-46.1\,\text{kJ mol}^{-1}

. Assuming standard conditions, what mass of ammonia must be produced for the reaction to release exactly

1.50 \times 10^{2}\,\text{kJ}

of heat? (a)

1.10 \times 10^{2}\,\text{g}

(b)

9.11 \times 10^{1}\,\text{g}

(c)

5.54 \times 10^{1}\,\text{g}

(d)

2.77 \times 10^{1}\,\text{g}