Answered: 4) While the solid-liquid equilibrium…

4) While the solid-liquid equilibrium line on a phase diagram rarely has a negative slope (water being the common exception), the liquid-vapor line never has a negative slope. Why not?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter10: Liquids And Solids

Section: Chapter Questions

Problem 125AE

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4) While the solid-liquid equilibrium line on a phase diagram rarely has a negative slope (water being the common
exception), the liquid-vapor line never has a negative slope. Why not?

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The molar enthalpy of vaporization of water is Avap H = 40.65 kJ molat its normal boiling point. Use the Clausius-Clapeyron equation (given below) to calculate the vapor pressure of water at 105.96 °C. Assume Avan H does not depend on temperature. Give your answer in torr with at least one decimal place. dIn P dT RT
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