Thermodynamics key words

Question 1

Standard enthalpy of formation

Answer 1

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

Question 2

First ionisation enthalpy

Answer 2

The enthalpy change when one mole of +1 gaseous ions are formed from one mole of gaseous atoms

Question 3

Standard enthalpy of atomisation

Answer 3

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

Question 4

Bond dissociation enthalpy

Answer 4

The enthalpy change when all of the bonds of the same type in one mole of gaseous molecule are broken

Question 5

First electron affinity

Answer 5

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

Question 6

Lattice formation enthalpy

Answer 6

The enthalpy change to form one mole of a solid ionic compound from its gaseous ions

Question 7

Enthalpy of hydration

Answer 7

The enthalpy change when one mole of aqueous ions is formed from gaseous ions

Question 8

Enthalpy of solution

Answer 8

The enthalpy change when one mole of an ionic solution dissolves in enough solvent to form an infinitely dilute solution

Question 9

Second enthalpy of ionisation

Answer 9

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

Question 10

Second electron affinity

Answer 10

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