On the heat of dissolution of ammonia in water and the heat required to separate ammonia from aqueous ammonia solutions
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I have two questions for your guidance: 1. At the same solubility, is the heat of dissolution of ammonia in water related to pressure and temperature? 2. As stated in the title, is the heat required to separate ammonia from ammonia water related to the heat of dissolution of ammonia under the same conditions? Shouldn’t it be consistent in theory?
1. At the same solubility, the heat of dissolution of ammonia in water is related to pressure and temperature. Generally, as pressure increases, the heat of dissolution of ammonia increases ； As the temperature increases, the heat of solution for ammonia decreases. 2. The heat required to separate ammonia from ammonia water is related to the heat of dissolution of ammonia under the same conditions. Theoretically, the heat required to separate ammonia from ammonia water should be equal to the heat absorbed during its dissolution, as separating ammonia from the water is achieved through evaporation or other methods, and the heat absorbed during dissolution should equal the heat released during separation. .