Asked by Angel
If you can show me an example of one problem, I have no idea how to approach this.
Calculate where the number 40.67 came from.
Use the Clapeyron-Clausisus equation. Assuming that delta H vap does not change with temperature, this equation relates the change in vapor pressure and temperature to a substance's enthalpy of vaporization (R is the molar mass constant). Use this relationship and the fact that delta H vap of water at 25 degrees Celsius is 43.99 kJ/mol to calculate the vapor pressure of water at 5,25,50, and 95 degrees Celsius. Your results should be (in order and in Torr)
Calculate where the number 40.67 came from.
Use the Clapeyron-Clausisus equation. Assuming that delta H vap does not change with temperature, this equation relates the change in vapor pressure and temperature to a substance's enthalpy of vaporization (R is the molar mass constant). Use this relationship and the fact that delta H vap of water at 25 degrees Celsius is 43.99 kJ/mol to calculate the vapor pressure of water at 5,25,50, and 95 degrees Celsius. Your results should be (in order and in Torr)
Answers
Answered by
DrBob222
It's hard to explain a number that doesn't show up in the writing. But I think the 40.67 is the heat vaporization of water although the problem lists it as 43.99.
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