State the definition of enthalpy change of formation, ΔHθf.
Exothermic reaction profiles show the energy change in the reaction.
1 mole of butane is formed from carbon and hydrogen via the following equation
4C (s) + 5H2 (g) → C4H10 (g) ΔHθf = -126 kJ mol-1
Calculate the enthalpy change for the following reaction.
Write an equation for the complete combustion of butane.
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