00:01
In this problem, we want to determine how the root mean squared speed of a gas changes as we change the molar mass of the gas and the temperature.
00:10
Remember that the root mean squared speed, or urms, is equal to the square root of 3rt over mu, where t is a temperature, mu is a molar mass, and r is a constant.
00:29
So in part a, we want to know, for example, as we increase the molar mass, what happens to the root mean squared speed? well, we can see that in this equation, the molar mass is in the denominator on the right side of this equation.
00:51
So if we were to increase that molar mass, this would drive down the root mean squared speed.
00:57
And this also makes sense because an increase of molar mass results in a heavier mass.
01:01
Molecule, and heavier objects move slower than lighter ones...