### 9.85

Posted:

**Mon Feb 05, 2018 10:40 am**The question states:

Potassium nitrate dissolves readily in water, and its enthalpy of solution is 34.9 kJ mol 1. (a) Does the enthalpy of solution favor the dissolving process? (b) Is the entropy change of the system likely to be positive or negative when the salt dissolves? (c) Is the entropy change of the system primarily a result of changes in positional disorder or thermal disorder? (d) Is the entropy change of the surroundings primarily a result of changes in positional disorder or thermal disorder? (e) What is the driving force for the dissolution of KNO3?

I don't understand the explanation in the solutions manual for part a and I don't understand how we are supposed to know the answer to part e. Any help for this question in general would be great!

Potassium nitrate dissolves readily in water, and its enthalpy of solution is 34.9 kJ mol 1. (a) Does the enthalpy of solution favor the dissolving process? (b) Is the entropy change of the system likely to be positive or negative when the salt dissolves? (c) Is the entropy change of the system primarily a result of changes in positional disorder or thermal disorder? (d) Is the entropy change of the surroundings primarily a result of changes in positional disorder or thermal disorder? (e) What is the driving force for the dissolution of KNO3?

I don't understand the explanation in the solutions manual for part a and I don't understand how we are supposed to know the answer to part e. Any help for this question in general would be great!