A 9.70 L container holds a mixture of two gases at 53C. The partial pressures of gas A and gas B, respectively, are 0.368 atm and 0.893 atm. If 0.210 mol of a third gas is added with no change in volume or temperature, what will the total pressure become?

1 Answer
May 9, 2017

This is an illustration of Dalton's Law of Partial Pressures......

Explanation:

Dalton's Law of Partial Pressures......, which states, that in a gaseous mixture, the partial pressure of a gaseous component is the same as the pressure it would exert if it alone occupied the container.

And thus Pmixture=PA+PB+Pc

We are given PA, and PB, but we must work out PC, which we can do by assuming ideality and employing the equation:

PC=0.210mol×0.0821LatmKmol×326K9.70L=0.579atm.

And so.....Pmixture=PA+PB+Pc

=(0.368+0.893+0.579)atm

=1.82atm.