Question

Vapour pressure of water, acetone and ethanol at 293 K are 2.34, 12.3 and 5.85 $k_{Pa}$ respectively. Which of these has the lowest and the highest boiling point? At 293 K which of these evaporates least in a sealed container before equilibrium is reached?

Answer 1

we know that he temperature increases,the vapor pressure of a liquid also increases and at the boiling point,vapour pressures becomes equal to the atmospheric pressure.A liquid with lower vapour pressure will require a higher temperature for it to attains it vapour pressure equal to atmospheric pressure. Therefore the liquid with the highest vapour pressure will have the lowest B.P.Acetone has the lowest B.P and water has the highest B.P.

hope it will help!!

Answer 2

Answer:

The constant, further, is the same for all gases, provided that the mass of gas being compared is one mole, or one molecular weight in grams. For one mole, therefore, pV/T = R. The dimensions of the universal gas constant R are energy per degree per mole.