5.2.1 Lattice Enthalpy

Question 1

Define standard enthalpy of neutralisation

Answer 1

the enthalpy change when solutions of an acid and an alkali react together under standard conditions to produce 1 mole of water

Question 2

Define standard enthalpy of formation

Answer 2

The enthalpy change which occurs when one mole of the compound is formed from its elements under standard conditions, and with everything in its standard state.

Question 3

Define standard enthalpy of Combustion

Answer 3

The enthalpy change which occurs when one mole of the compound is burned completely in oxygen under standard conditions, and with everything in its standard state.

Question 4

Define standard enthalpy of solution

Answer 4

The amount of heat that is released or absorbed during the dissolving process (at constant pressure).

Question 5

Define standard enthalpy of hydraton

Answer 5

The enthalpy change when 1 mole of gaseous ions dissolve in sufficient water to give an infinitely dilute solution. Hydration enthalpies are always negative.

Question 6

Define First ionisation energy

Answer 6

The energy required to remove one mole of electrons from one mole of gaseous atoms to produce one mole of gaseous 1+ ions

Question 7

Define second ionisation energy

Answer 7

The energy required to remove one mole of electrons from one mole of gaseous 1+ ions to produce 1 mole of 2+ ions

Question 8

Define standard enthalpy of neutralisation