CHE 104 Lecture Notes - Lecture 18: Partial Pressure, Exothermic Process, Spontaneous Process

• School: West Chester University
• Department: Chemistry
• Course: CHE 104
• Professor: Townsend

Document Summary

Generally to be soluble a salt will have soln h that is either exothermic or only slightly endothermic. If soln h is very endothermic then the salt will most likely be insoluble. There are many examples where the enthalpy of the system decreases ( h is negative ) in a spontaneous process would result. In cases where soln h is exothermic you would expect that a solution. They would results because it is not favorable to have a positive h but some are spontaneous. There must be some other factors involved that sometimes counteract an unfavorable h. Turns out to be the change of entropy of the system. Will go into further depth when we get to chapter 18. If soluble , most likely will have a negative h. If insoluble , most likely will have a positive h. Pressure does not affect the solubility of solids or liquids that. Pressure does affect the solubility of gases.