Question

What does Dalton's law of partial pressure say?

A. The pressure contributed by larger gas molecules is more than smaller gases.
B. The total pressure of a gas mixture is the sum of the individual pressures.
C. The total pressures of a gas mixture is the average of the individual pressures.
D. The pressure of a gas can only be partially known, since no gas is truly ideal

Answer 1

Hi!

The Dalton's Law of partial pressure states that The total pressure of a gas mixture is the sum of the individual pressures.

This can be written in the form of an equation in the following way:


`Ptot=p1+p2+p3+...+pn`

This law was first discovered by the English Chemist John Dalton in 1802.

This law is derived from the observation that two gases in a mixture behave independently and occupy the same volume in a closed compartment, so the contribution to pressure will depend on the sum of the individual pressures of each gas.