Refrigeration and Air Conditioning
The evolution of heat of solution takes place in ammonia absorption plant when

Weak solution mixes with strong solution
Ammonia vapour goes into solution
Lithium bromide mixes with ammonia
Ammonia vapour is driven out of solution

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Refrigeration and Air Conditioning
For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then

Perfectly tight vapour seal should be used
Smaller cabinet should be used
Refrigerant with lower evaporation temperature should be used
Bigger cabinet should be used

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