Using the standard molar enthalpies of formation given, calculate the standard enthalpy of reaction for the combustion of propane (C3H8) into carbon dioxide and water. C3H8(g) + 5O2(g) ? 3CO2 + 4H2O(g) 2043.7 kJ -2043.7 kJ
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The standard molar enthalpy of formation is the amount of energy required to form one mole of a substance from its constituent elements in their standard states. The standard molar enthalpies of formation for propane (C3H8), oxygen (O2), carbon dioxide (CO2), and Show more…
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Propane (C3H8) burns according to the following balanced equation: C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(g) Calculate ΔH∘rxn for this reaction using standard enthalpies of formation. (The standard enthalpy of formation of gaseous propane is -103.9 kJ/mol)
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The standard enthalpies of formation (298 K) of methanol and octane are -239 and $-250 \mathrm{kJ} \mathrm{mol}^{-1}$. Determine the enthalpy change when a mole of each is fully combusted, and assess the relative merits of these compounds as fuels. $\left(\Delta_{f} H^{\circ}\right.$ $\left.\mathrm{CO}_{2}(\mathrm{g})=-394, \mathrm{H}_{2} \mathrm{O}(\mathrm{l})=-286 \mathrm{kJ} \mathrm{mol}^{-1} .\right)$
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