Lattice enthalpy defs

Question 1

Definition of standard enthalpy change of formation

Answer 1

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

Question 2

Definition of standard enthalpy change of atomisation

Answer 2

The enthalpy change when one mole of gaseous atoms are formed from an element in its standard state.

Question 3

Definition of the standard enthalpy change of first ionisation energy

Answer 3

The enthalpy change when one mole of electrons is removed from one mole of gaseous atoms.

Question 4

Definition of standard enthalpy change of second ionisation energy

Answer 4

The enthalpy change when one mole of electrons is removed from one mole of singly posiitve gaseous ions.

Question 5

Definition of standard enthalpy change of first electron affinity

Answer 5

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

Question 6

Definition of standard enthalpy change of second electron affinity

Answer 6

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

Question 7

Definition of standard enthalpy change of change of hydration

Answer 7

The enthalpy change when one mole of aqueous ions are formed from their gaseous ions in their standard states under standard conditions.

Question 8

Definition of lattice enthalpy

Answer 8

The enhtalpy change when 1 mole of solid ionic lattice is formed from its gaseous ions (under standard conditions).