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Solubility curve of Na(2)SO(4).10H(2)O i...

Solubility curve of `Na_(2)SO_(4).10H_(2)O` in water with temperature is given as

A

Solution process is exothermic

B

Solution process is exothermic till `32.4^(@)C` and endothermic after `32.4^(@)C`

C

Solution process is endothermic till `32.4^(@)` and exothermic thereafter

D

Solution process is endothermic

Text Solution

Verified by Experts

The correct Answer is:
C
Below `34^(@)C, Na_(2)SO_(4).10H_(2)O` exists as such, since in this part solubility increases. This implies that process must be endothermic. Thereafter, solubility decrease with rise in temperature. It means that the solution process is exothermic. In fact after `34^(@)C` the substance exists in anhydrous state `Na_(2)SO_(4)`.
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