Which chemical process is associated with the lattice energy for sodium chloride?
nacl(g) → na+(g) + cl-(g)
nacl(s) + h2o(l) → na+(aq) + cl-(aq)
na(s) + 1/2 cl2(g) → nacl(s)
nacl(s) → na+(g) + cl-(g)

I am absolutely sure thathe chemical process which is associated with the lattice energy for sodium chloride is the last option from the scale represented above - NaCl(s) → Na+(g) + Cl-(g). I choose this one because it has to perform reversed process that must release the same energy. 
Do hope you still need the answer because this one is really helpful!

30litre of li2o is 1.0002mole approximately 1 mole

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