Propane combusts according to the equation per mole of propane

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

Problem

Propane combusts according to the equation

\mathrm{C_3H_8(g)} + 5\,\mathrm{O_2(g)} \rightarrow 3\,\mathrm{CO_2(g)} + 4\,\mathrm{H_2O(l)};\; \Delta H^\circ = -2.22 \times 10^{3}\,\text{kJ}

per mole of propane. If

15.0\,\text{g}

of propane are burned completely at standard conditions, what is the enthalpy change for the process? (a)

-2.22 \times 10^{3}\,\text{kJ}

(b)

+7.55 \times 10^{2}\,\text{kJ}

(c)

-7.55 \times 10^{2}\,\text{kJ}

(d)

-1.11 \times 10^{3}\,\text{kJ}