Partial Pressure

Moderators: Chem_Mod, Chem_Admin

Posts: 109
Joined: Wed Sep 30, 2020 9:31 pm

Partial Pressure

Postby Ian_Lee_1E » Wed Jan 06, 2021 12:10 pm

What is the meaning of partial pressure?

Stuti Pradhan 2J
Posts: 153
Joined: Wed Sep 30, 2020 9:32 pm
Been upvoted: 5 times

Re: Partial Pressure

Postby Stuti Pradhan 2J » Wed Jan 06, 2021 12:14 pm

Partial pressure is the pressure of one of the gases in a mixture. Essentially, the pressure of one gas if it was placed alone in the same volume as the mixture, is its partial pressure in the mixture. Since there is a mixture of gases, each gas has its own partial pressure, which can be added to find the total pressure.

Hope this helps!
Last edited by Stuti Pradhan 2J on Wed Jan 06, 2021 12:17 pm, edited 1 time in total.

Karl Yost 1L
Posts: 162
Joined: Thu Dec 17, 2020 12:19 am

Re: Partial Pressure

Postby Karl Yost 1L » Wed Jan 06, 2021 12:16 pm

In a system containing a mixture of gases, there is a certain value of P, i.e. pressure, that is exerted by the mixture of gases. Partial pressure is the pressure exerted by a given gas.

For instance, in the reaction:


each gas will contribute differently to the overall pressure. Partial pressures give us a quantitative way of understanding this contribution.

Becca Nelson 3F
Posts: 103
Joined: Wed Sep 30, 2020 9:52 pm

Re: Partial Pressure

Postby Becca Nelson 3F » Wed Jan 06, 2021 12:18 pm

From my understanding, the partial pressure is the pressure of the specific gas if it occupied the volume by itself. We can find the partial pressure if we have the number of moles, volume, temperature, and R value using PV=nRT. The sum of all of the partial pressure is the pressure. I hope this helps.

Posts: 40
Joined: Wed Nov 18, 2020 12:22 am

Re: Partial Pressure

Postby Neal_Agarwal_3B » Wed Jan 06, 2021 12:18 pm

Partial pressure is the portion of the total pressure exerted by a single gas molecule. For example, if there is a total pressure in a beaker of 2 atm and there is 1 atm of water and 1 atm of sulfur dioxide, then you would say the partial pressure of water and sulfur dioxide is 0.5 in the system. It is essential another way of representing how much of a certain molecule exists in a system relative to the system as a whole.

Return to “Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions”

Who is online

Users browsing this forum: No registered users and 2 guests