Latttice Enthalpy Definitions

Question 1

Lattice Enthalpy

Answer 1

The Enthalpy change when one mole of an ionic compound is formed from its gaseous ions

Question 2

Enthalpy change of formation

Answer 2

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

Question 3

Enthalpy change of atomisation

Answer 3

Enthalpy change when one mole of gaseous atoms is formed from its elements in its standard state under standard conditions

Question 4

First ionisation energy

Answer 4

Enthalpy change when one electron is removed from each atom in one mole of gaseous atoms to form one mole of gaseous +1 ions

Question 5

Second ionisation energy

Answer 5

The Enthalpy change when one electron is removed from each ion in one mole of gaseous +1 ions to form one mole of gaseous +2 ions

Question 6

First electron affinity

Answer 6

The Enthalpy change when one electron is added to each atom in one mole of gaseous atoms to from one mole of gaseous -1 ions

Question 7

Second electron affinity

Answer 7

The Enthalpy change when one electron is added to each ion in one mole of gaseous -1 ions to form one mole of gaseous 2- ions