Question

define
lattice enthalphy

Answer 1

$\huge\bold\red{Hey!}$

Lattice Anthalpy is defined as the enthalpy change when 1 mole of ionic solid was formed from it's scattered gaseous ions.

Answer 2

Answer:

1)The lattice energy of a crystalline solid is a measure of the energy released when ions are combined to make a compound. It is a measure of the cohesive forces that bind ions. Lattice energy is relevant to many practical properties including solubility, hardness, and volatility.

2)Lattice enthalpy is simply the change in Enthalpy associated with the formation of one mole of an ionic compound from its gaseous ions under standard conditions.

3)Lattice energy is defined as the energy required to separate a mole of an ionic solid into gaseous ions. Lattice energy cannot be measured empirically, but it can be calculated using electrostatics or estimated using the Born-Haber cycle.

4)The bond between ions of opposite charge is strongest when the ions are small. The lattice energies for the alkali metal halides is therefore largest for LiF and smallest for CsI, as shown in the table below. The ionic bond should also become stronger as the charge on the ions becomes larger.

5)Note.... Lattice energy gives us information about the stability of ionic solids by telling us the strength of the forces holding their ions together. It can refer to either the amount of energy required to break an ionic solid into its gaseous ions or the amount of energy released when gaseous ions join to form an ionic solid.

main point is third.