Enthalpy Changes

Question 1

What is the standard enthalpy change of a reaction

Answer 1

• the enthalpy change of a reaction according to the molar quantities of the equation under standard conditions

Question 2

What is the enthalpy change of formation

Answer 2

• the enthalpy change when one mole of a compound is formed from its elements in their standard states under standard conditions

Question 3

What is the standard enthalpy change of combustion

Answer 3

• the enthalpy change when one mole of a substance is completely burned in oxygen under standard conditions

Question 4

What is the standard enthalpy change of neutralisation

Answer 4

• the enthalpy change when an acid and an alkali react together to form one mole of water under standard conditions