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Ch. 18 - Free Energy and Thermodynamics

Chapter 18, Problem 101

A metal salt with the formula MCl2 crystallizes from water to form a solid with the composition MCl2 • 6 H2O. The equilibrium vapor pressure of water above this solid at 298 K is 18.3 mmHg. What is the value of ΔG for the reaction MCl2 • 6 H2O(s) ⇌ MCl2(s) + 6 H2O( g) when the pressure of water vapor is 18.3 mmHg? When the pressure of water vapor is 760 mmHg?

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