1. Give a complete definition for each of the following enthalpy changes. In each case, please include an equation that represents the process to which the enthalpy change applies:

a. Enthalpy of dissolution of the ionic compound X+Y-

b. Lattice energy of the ionic compound X+Y-

c. Enthalpy of hydration of the gaseous ion Z+ (g)

2. Explain how the above three enthalpy changes are related. Use a diagram to explain if appropriate.