Question

KspK_{s p} for silver chloride at 25.0C25.0^{\circ} \mathrm{C} is 1.782×10101.782 \times 10^{-10}. At 35.0C,Ksp35.0^{\circ} \mathrm{C}, K_{s p} is 4.159×10104.159 \times 10^{-10}. What are ΔH\Delta H^{\circ} and ΔS\Delta S^{\circ} for the reaction?

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Answered 1 year ago
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To get the values of the ΔS°\Delta S\degree and ΔH°\Delta H\degree, we have to calculate the ΔG°\Delta G\degree for each temperature. When we have ΔG\Delta G we can get the ΔH°\Delta H\degree and ΔS°\Delta S\degree by using the a system of two equations with two unknowns.

The formula for the ΔG\Delta G is:

ΔG=ΔHTΔS\Delta G=\Delta H-T\Delta S

We will assume that the ΔH°\Delta H\degree and ΔS°\Delta S\degree have the constant values, no matter of the temperature.

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