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Enthalpy of Solution

Heat of solut...

Question

Heat of solution of anhydrous $C u S O_{4}$ is -15.9 kcal and heat of hydration of anhydrous $C u S O_{4}$ is -18.9 kcal. The heat of solution of $C u S O_{4} .5 H_{2} O$ is ..........

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Solution

$C u S O_{4} \to C u S O_{4} + 5 H_{2} O$ ; $△ H = - 15.89 K c a l / m o l$

$C u S O_{4} + 5 H_{2} O \to C u S O_{4} .5 H_{2} O$ ; $△ H = - 18.9 K C a l$

$C u S O_{4} .5 H_{2} O \to C u S O_{4} + 5 H_{2} O$ ;

$△ H = - 15.9 + 18.9 = 3$

Heat of solution of anhydrous $C u S O_{4}$ is $3$

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