To calculate the enthalpy change of combustion for butane, we need to first determine the number of moles of butane burned and then use the heat energy produced to find the enthalpy change per mole.1. Calculate the molar mass of butane C4H10 :C: 12.01 g/mol 4 carbon atoms = 4 * 12.01 = 48.04 g/molH: 1.01 g/mol 10 hydrogen atoms = 10 * 1.01 = 10.10 g/molMolar mass of butane = 48.04 + 10.10 = 58.14 g/mol2. Calculate the number of moles of butane burned:moles = mass / molar massmoles = 2.50 g / 58.14 g/mol = 0.0430 mol3. Calculate the enthalpy change of combustion per mole of butane:Enthalpy change = heat energy / molesEnthalpy change = 8.64 kJ / 0.0430 mol = 200.93 kJ/molThe enthalpy change of combustion for butane is approximately 200.93 kJ/mol.