Question
Is the dissolution of calcium sulfate endothermic or exothermic? How do you know?
Answers
DrBob222
http://en.wikipedia.org/wiki/Calcium_sulfate
The site above shows a SLIGHT increase for CaSO4.2H2O with temperature which makes it slightly endothermic but at elevated temperatures that is reversed and the solubility decreases rapidly with increasing temperature.
The site above shows a SLIGHT increase for CaSO4.2H2O with temperature which makes it slightly endothermic but at elevated temperatures that is reversed and the solubility decreases rapidly with increasing temperature.