Question

The total pressure in a flask containing air and ethanol at 257C is 800 mm Hg. If the pressure of the air in the flask is 762 mm Hg, the vapor pressure of ethanol is?

I tried doing a relationship of P1 over t1 etc but i don't get the right answer.

Answer 1

Dalton's law of partial pressures says that the total pressure equals the sum of the partial pressures of each gas in the container. If the partial pressure of air is 762 and the total is 800, then the partial pressure of ethanol is >>

Answer 2

38 mm Hg