Lithium iodide has a lattice energy of −7.3×102kj/mol and a heat of hydration of −793kj/mol. find the heat of solution for lithium iodide. determine how much heat is evolved or absorbed when 10.0g of lithium iodide completely dissolves in water.

113.6567 kiloJoules of heat is evolved or absorbed when 10.0 g of lithium iodide completely dissolves in water.

Explanation:

Lithium iodide has a lattice energy =

Lithium iodide has a heat of hydration =

Heat of the solution of lithium iodide :

= -1,523 kJ/mol

Mass of lithium iodide = 10.0g

Moles of lithium iodide =

Heat of the solution of lithium iodide when 0.07462 mol is dissolved: Q

Q = -113.6567 kJ

(Negative sign indicates that energy released which means that temperature of the solution after dissolving lithium iodide  will increase.)