Question

The lattice energy of sodium bromide and hydration energies of sodium and bromide ions are 733,406 and 335kj/mol respectively.

1. Determine the heat of solution of sodium bromide. 
2. Sketch an energy level diagram of the process.  

Answer 1

1. ∆H_sol=H_latt + H_hyd
   =+733 + (−406 + −335)
   =−8KJ/mole
2.