00:01
Hello, here we blow up a spherical balloon to the diameter of 50 centimeters until the absolute pressure inside becomes 1 .25 atmospheres and the temperature is 22 degrees c.
00:19
The gaze is nitrogen and first we have to find mass of a single molecule of nitrogen.
00:34
Let's do this.
00:36
So, mass of a single molecule equals.
00:39
To mass of sample over a number of molecules.
00:43
That is mass of a sample over number of moles times avagadro number, that is mass over mass divided by molar mass times avagadro number.
01:01
Therefore, that is molar mass over avagadro number.
01:29
That is 4 .65 times 10 power by negative, 23 grams.
01:41
Now let's answer question b.
01:45
We have to calculate translational kinetic energy per single molecule.
01:54
So that is 3 over 2 times kc...