Homework Help: Chemistry

Posted by Chris on Sunday, March 17, 2013 at 8:30pm.

Is the dissolution of calcium sulfate endothermic or exothermic? How do you know?

Chemistry - DrBob222, Sunday, March 17, 2013 at 9:29pm
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.

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