Lattice Enthalpies

Question 1

What is lattice enthalpy?

Answer 1

Energy needed to break a bond between two ions

Measure of ionic bond strength

Question 2

What is lattice formation enthalpy?

Answer 2

Enthalpy change when 1 mole of a solid ionic compound is formed from its gaseous ions under standard conditions

Question 3

What is lattice dissociation enthalpy?

Answer 3

Enthalpy change when 1 mole of a solid ionic compound is completely dissociated into its gaseous ions under standard conditions

Question 4

What is the enthalpy change of formation?

Answer 4

Enthalpy change when 1 mole of a compound is formed from its elements in their standard states under standard conditions

Question 5

What is bond dissociation enthalpy?

Answer 5

Enthalpy change when all the bonds of the same type in 1 mole of gaseous molecules are broken

Question 6

What is the enthalpy change of atomisation of an element?

Answer 6

Enthalpy change when 1 mole of gaseous atoms is formed from an element in its standard states

Question 7

What is enthalpy change of atomisation of a compound?

Answer 7

Enthalpy change when 1 mole of a compound in its standard state is converted to gaseous atoms

Question 8

What is the first ionisation enthalpy?

Answer 8

Enthalpy change when 1 mole of gaseous ions is formed from 1 mole of gaseous atoms

Question 9

What is the first electron affinity?

Answer 9

Enthalpy change when 1 mole of gaseous 1- ions is made from 1 mole of gaseous atoms

Question 10

What is the enthalpy change of hydration?

Answer 10

Enthalpy change when 1 mole of aqueous ions is formed from gaseous ions

Question 11

What is enthalpy change of solution?

Answer 11

Enthalpy change when 1 mole of solute is dissolved in sufficient solvent that no further enthalpy change occurs on further dilution

Question 12

What is delta H?

Answer 12

Heat energy transferred in a reaction at constant pressure