Enthalpy

Question 1

Standard Enthalpy of Formation (△fH°)

Answer 1

The enthalpy of formation is the energy required to produce 1 mole of product from its constituent atoms in their standard states in standard conditions

Question 2

Standard Enthalpy of Combustion (△cH°)

Answer 2

The enthalpy of combustion is the energy required to react 1 mole of reactant with oxygen under standard conditions

Question 3

Enthalpy of fusion (△fusH°)

Answer 3

The enthalpy of fusion is the amount of energy required to convert 1 mole of a substance from a solid to a liquid at the melting point

Question 4

Enthalpy of vaporisation (△vapH°)

Answer 4

The enthalpy of vaporisation is the amount of energy required to convert 1 mole of a substance from a liquid into a gas state at the boiling point

Question 5

Enthalpy of sublimation (△subH°)

Answer 5

The enthalpy of sublimation is the amount of energy required to convert 1 mole of a substance from a solid into a gas state at the sublimation point.

Question 6

Enthalpy of reaction (△rH°)

Answer 6

For any given reaction