Types Of Enthalpy Change

Question 1

Enthalpy change of formation

Answer 1

The enthalpy change when 1 mole of a compound is formed from it’s elements in their standard states under standard conditions.

Question 2

Lattice enthalpy of formation

Answer 2

The enthalpy change when 1 mole of a solid ionic compound

is formed from it’s gaseous ions under standard conditions.

Question 3

Lattice enthalpy of dissociation

Answer 3

The enthalpy change when 1 mole of a solid ionic compound is dissociated into it’s gaseous ions under standard conditions.

Question 4

Enthalpy change of dissociation

Answer 4

The enthalpy change when 1 mole of bonds of the same type of molecule in the gaseous state is broken.

Question 5

Enthalpy change of 1st ionisation

Answer 5

The enthalpy change when 1 mole of gaseous 1+ ions are made from 1 mole of gaseous atoms.

Question 6

Enthalgy change of

atomisation

Answer 6

The enthalpy change when 1 mole of gaseous atoms is made from an element in it’s standard state.

Question 7

electron affinity

Answer 7

The enthalpy change when 1 mole of gaseous 1- ions are made from 1 mole of gaseous atoms.

Question 8

2nd electron affinity

Answer 8

The enthalpy change when 1 mole of gaseous 2- ions are made from 1 mole of gaseous 1- ions.

Question 9

Enthalpy change of 2nd

ionisation

Answer 9

The enthalpy change when 1 mole of gaseous 2+ ions are made from 1mole of gaseous 1+ ions

Question 10

Enthalpy change of a solution

Answer 10

the enthalpy change when 1 mole of an ionic substance is dissolved in the minimum amount of solvent to ensure no further enthalpy change is observed upon further dilution.

Question 11

Enthalpy of hydration

Answer 11

Enthalpy change when 1
mole of aqueous ions is made
from 1 mole of gaseous ions.