Pressure and Concentration in PV=nRT

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Pressure and Concentration in PV=nRT

Postby Jennifer1E » Sun Jul 23, 2017 9:00 pm

What is the relationship between pressure and concentration in the formula PV=nRT?

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Re: Pressure and Concentration in PV=nRT

Postby Chem_Mod » Sun Jul 23, 2017 10:57 pm

Concentration is moles per unit volume, which is the same as (n/V). If you rearrange the ideal gas law (PV=nRT) with this in mind, you'll see that pressure is directly proportional to concentration; in other words, as concentration increases, so does pressure.

Rithik Kumar 3E
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Re: Pressure and Concentration in PV=nRT

Postby Rithik Kumar 3E » Mon Nov 27, 2017 9:17 pm

The relationship stated above is correct. In addition, if you think of the situation of pressure and concentration conceptually, it makes sense as well. If the amount of moles of a molecule in the volume container (with a constant temperature) increases, the pressure of the gas increases. This is because there is an increase in the amount or frequency of collisions between the gas molecules, thereby exerting a greater amount of pressure on the container.

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