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Question: The solubility (S) of a solute in water varies with temperature as follows. S = A \(\mathrm { e } ^...

The solubility (S) of a solute in water varies with temperature as follows. S = A eΔH/RT\mathrm { e } ^ { - \Delta \mathrm { H } / \mathrm { RT } } .

For which of the following solute ln S vs 1/T plot is

When DH represent enthalpy of solution ?

A

CaO

B

CuSO4

C

MgSO4

D

CuSO4, 5H2O

Answer

CuSO4, 5H2O

Explanation

Solution

Since slope of the plot is negative, hence the enthalpy of dissolution is positive. For the hydrated salt usually the enthalpy of dissolution is positive