standard of heat combustion

Question

Define the standard heat of combustion

Answer 1

Standard enthalpy of combustion is defined as the enthalpy change when one mole of a compound is completely burnt in oxygen with all the reactants and products in their standard state under standard conditions (298K and 1 bar pressure).

Answer 2

This is the energy liberated when a substance undergoes complete compustion, with excess of oxygen at standard condition. 

Answer 3

This is the energy liberated when a substance undergoes complete compustion, with excess of oxygen at standard condition.