# How does molar mass affect pressure?

##### 1 Answer

Nov 15, 2015

#### Answer:

For ideal gas, no effect

#### Explanation:

Given the following ideal gas relation

(1)..............

Energy of the molecules is given by

(2) ............

setting

(3)............ , where N is total molecules

Through rearrangement, we can get the following relation

(4)............. .

It can be noted from equation (2) that at a particular temperature, there will be one value for energy. This means that the change in mass will be compensated by change in velocity. If the mass increases, velocity will decrease.... and vice versa

Reference:-

https://en.wikipedia.org/wiki/Kinetic_theory#Temperature_and_kinetic_energy