(a) Use the van’t Hoff equation in Problem 15.120 to derive the following expression, which relates the equilibrium constants at two different temperatures:
How does this equation support the prediction based on Le Châtelier’s principle about the shift in equilibrium with temperature? (b) The vapor pressures of water are 31.82 mmHg at 30°C and 92.51 mmHg at 50°C. Calculate the molar heat of vaporization of water.
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