Step-by-step explanation:
Molar heat combustion:
Molar heat of combustion is defined as heat released when 1 mole of substance is burnt under the action of oxygen gas to give water and carbon-dioxide.It is measured in kiloJoules (kJ) per mole.This heat of energy can be positive or negative.
- If the enthalpy is positive than the reaction is said to be an endothermic reaction.
- If the enthalpy is negative than the reaction is said to be an exothermic reaction.