Fuel X has a molar enthalpy of combustion and a molar mass of

CHEMISTRY · Subjective · AP · Chemistry · Thermochemistry · Thermochemistry

Problem

Fuel X has a molar enthalpy of combustion

\Delta H_{\mathrm{comb}} = -650\;\text{kJ mol}^{-1}

and a molar mass of

50.0\;\text{g mol}^{-1}

. Fuel Y has a molar enthalpy of combustion

\Delta H_{\mathrm{comb}} = -1200\;\text{kJ mol}^{-1}

and a molar mass of

110.\;\text{g mol}^{-1}

. Determine which fuel releases more energy per gram of fuel burned.