The standard enthalpy of formation of octane (C8H18) is −250 kJ/mol. Calculate the enthalpy of combustion of C8H18.Given : enthalpy of formation of CO2(g) and H2O(l) are −394 kJ/mol and −286 kJ/mol respectively:

The standard enthalpy of formation of octane (C8H18) is −250 kJ/mol.

1.	The standard enthalpy of formation of octane (C8H18) is −250 kJ/mol. Calculate the enthalpy of combustion of C8H18.Given : enthalpy of formation of CO2(g) and H2O(l) are −394 kJ/mol and −286 kJ/mol respectively:
Answer» The standard enthalpy of formation of octane $(C_{8} H_{18})$ is $- 250 k J / m o l$ . Calculate the enthalpy of combustion of $C_{8} H_{18}$ . Given : enthalpy of formation of $C O_{2} (g)$ and $H_{2} O (l)$ are $- 394 k J / m o l$ and $- 286 k J / m o l$ respectively: