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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.  

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  1. ∆Hsol=Hlatt + Hhyd
    =+733 + (−406 + −335)
    =−8KJ/mole

  2. Energy level diagram of process of heating sodium bromide solution
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