1) If the energies required to separate the solvent and solute molecules are H s

Q: 1) If the energies required to separate the solvent and solute molecules are H s

1) Enthalpy of solution = (-53.6)+25.6+18.9 = -9.1 kj/mol 2) as the dissolved amount is greater than the solubility.so that it is called as "super saturated solution". 3) as the dissolved amount is less than the solubility.so that it is called as " unsaturated solution".

ID: 979834 • Letter: 1

Question

1) If the energies required to separate the solvent and solute molecules are Hsolvent = 25.6 kJ/mol and Hsolute = 18.9 kJ/mol, what is the enthalpy of solution (Hsoln) if the enthalpy change when the solute and solvent combine (Hmix) is -53.6 kJ/mol?

2) The solubility of sodium chloride at 25oC in water is 35 g / 100 g water. What term would be used to describe a solution at 25oC that contains 38g of NaCl in 100 g of water?

3) The solubility of sodium chloride at 25oC in water is 35 g / 100 g water. What term would be used to describe a solution at 25oC that contains 30g of NaCl in 100 g of water?

Explanation / Answer

1) Enthalpy of solution = (-53.6)+25.6+18.9 = -9.1 kj/mol

2) as the dissolved amount is greater than the solubility.so that it is called as "super saturated solution".

3) as the dissolved amount is less than the solubility.so that it is called as " unsaturated solution".

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1) If the energies required to separate the solvent and solute molecules are H s

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