Question Detail
Question
When one mole of a substance burns in excess oxygen, the heat change is called:
Correct Answer
Option A is the correct answer.
Detailed Explanation
The enthalpy of combustion is defined as the enthalpy change when one mole of a substance undergoes complete combustion in excess oxygen under standard conditions.
Hint
The term 'burns' is the key here. Which enthalpy change is associated with burning?