topic 8

Question 1

lattice enthalpy

Answer 1

enthalpy change when one mole of ionic solid is formed from its gaseous ions.

Question 2

enthalpy of formation

Answer 2

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

Question 3

enthalpy of atomisation

Answer 3

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

Question 4

first ionisation energy

Answer 4

energy required to remove one mole of electrons from one mole of gaseous atoms to form one mole of 1+ ions.

Question 5

first electron affinity

Answer 5

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