| Abstract: At present time, there are several ways to explain the anhydration of copper(Ⅱ) sulphate pentahydrate. Most of chemists consider that the anhydration is undertaken via three steps, others think it would be done through two steps.The present studies on the anhydration of CuSO4·5H2O using DTA, show that under thermal eqilibrium condition anhydration is finished via four steps. Water molecules are removed from CuSO4·5H2O in the order of 2,1,1,1. The temperature range closing thermal eqilibrium for each step of anhydration depends on the experimental conditions(such as heating rate, size of grain, etc.), and is present in this work. |
