Enthalpy and Entropy

Question 1

What is lattice enthalpy? What is the definition of Lattice enthalpy ΔHLE? (2)

Answer 1

• A measure of the strength of ionic bonding in a giant covalent lattice.
• The enthalpy change that accompanies the formation of one mole of an ionic compound from its gaseous ions under standard conditions

Question 2

Is Lattice Enthalpy and exothermic or endothermic process? (2)

Answer 2

• Exothermic

- Large amounts of energy are released upon the formation