## Partial pressures

Kevin Hernandez 3A
Posts: 21
Joined: Fri Sep 29, 2017 7:06 am

### Partial pressures

The reaction 2 SO2 (g) + O2 (g) ⇌ 2 SO3 (g) occurs in a 1.00 L flask at 312 K and at equilibrium the concentrations are 0.075 mol.L-1 SO2 (g), 0.537 mol.L-1 O2 (g), and 0.925 mol.L-1 SO3 (g). Calculate their respective partial pressures at 312 K using R = 8.206 × 10-2 L.atm.K-1.mol-1.

Andrea Grigsby 1I
Posts: 60
Joined: Fri Sep 29, 2017 7:03 am

### Re: Partial pressures

use the equation PV=nRT and substitute the values in

Posts: 20
Joined: Fri Sep 29, 2017 7:06 am
Been upvoted: 1 time

### Re: Partial pressures

Solve for P using P= (n/v)(R)(T). They already give us the concentrations, which is mol.L, or n/v. Substitute the different concentrations into the equation and you get the respective pressures for each gas.

Guangyu Li 2J
Posts: 50
Joined: Fri Sep 29, 2017 7:07 am
Been upvoted: 1 time

### Re: Partial pressures

Dalton Law of Partial Pressure is the theorem for the ideal gases specifically.

First of all, the gases suitable for this law must be ideal gases.

According to this law, if the gases in the container don't react with each other, every kinds of gases are distributed evenly in the container. The pressure they exert each is equal to the pressure they occupy in the container.

Kailie_Giebink_1E
Posts: 26
Joined: Fri Apr 06, 2018 11:02 am

### Re: Partial pressures

yes you use pv=nrt