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Gas Pressure

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Wize University Chemistry Textbook > Intermolecular Forces and Physical Properties

Vapor Pressure Cntd. (Clausius-Clapeyron Equation)

2 Activities

What is the pressure (in mm Hg) of the gas inside the apparatus below if the outside pressure Patm = 750 mm Hg,
∆h1 = 40 mm and ∆h2 = 30 mm?


More Vapor Pressure Cntd. (Clausius-Clapeyron Equation) Questions:
An alkane’s vapour pressure at 25.00 °C is 6.00 kPa. What is its vapour pressure at 80.00 °C if the enthalpy of vaporization is 43.0 kJ/mol? (Give your answer in kPa, do NOT include units in your answer)
Hexane is heated from 0oC to 50oC and the equilibrium vapour pressure increases from 0.06 atm to 0.53 atm.
1. Calculate the ΔHovap for hexanes. Report your answer in kJ/mol to three significant figures. Do not include units in your answer.
2. The human nose can detect hexane at a partial pressure of 0.005 atm. Estimate the temperature at which we can no longer smell hexane. Report your answer in K to three significant figures. Do not include units in your answer
Vapour pressure
Assuming that the heat of vaporization is temperature independent what is the vapour pressure of water at 65oC? ΔvapHwater = 40.68kJ/mol .