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The enthalpy of combustion of a hydrocarbon is the enthalpy change when A one mole of a hydrocarbon burns to give one mole of water B one mole of a hydrocarbon burns to give one mole of carbon dioxide C one mole of a hydrocarbon burns completely in oxygen D one mole of a hydrocarbon burns in one mole of oxygen. - Scottish Highers Chemistry - Question 12 - 2017
Question 12
The enthalpy of combustion of a hydrocarbon is the enthalpy change when A one mole of a hydrocarbon burns to give one mole of water B one mole of a hydrocarbon burns... show full transcript
Worked Solution & Example Answer:The enthalpy of combustion of a hydrocarbon is the enthalpy change when A one mole of a hydrocarbon burns to give one mole of water B one mole of a hydrocarbon burns to give one mole of carbon dioxide C one mole of a hydrocarbon burns completely in oxygen D one mole of a hydrocarbon burns in one mole of oxygen. - Scottish Highers Chemistry - Question 12 - 2017
Step 1
C one mole of a hydrocarbon burns completely in oxygen
Answer
The enthalpy of combustion is defined as the heat energy released when one mole of a substance completely reacts with oxygen under standard conditions. In this case, option C correctly describes that a hydrocarbon, when burned completely in oxygen, will undergo a reaction that releases energy. The other options describe incomplete reactions or do not align with the standard definition of enthalpy of combustion.