00:02
Hi there.
00:03
In this question, we are working with the ideal gas law.
00:08
And we are provided with the equation for the ideal gas law.
00:12
It is pv equals nrt, where p is pressure, b is volume, n is the number of moles of the gas.
00:21
R is the universal gas constant, and t is the kelvin temperature.
00:26
The first thing the question asks us to do is to rearrange this equation to solve for p.
00:32
To do that, we need to divide both sides.
00:35
By v to get p by itself.
00:37
When we do that, v will cancel on the left, leaving pressure all by itself.
00:44
So we've just solved for pressure.
00:46
It is equal to nrt divided by v.
00:51
That is our first answer, the answer of the rearranged equation to solve for p.
00:57
Next, we're given some variables to put into this equation to solve for the pressure under these other conditions.
01:06
So the number of moles is 0 .638.
01:14
R, the universal gas constant.
01:16
We have some different values for r based upon the units used.
01:20
I'm going to use the one that says r is 0 .0 -821 liters times atmospheres over mole times kelvin.
01:34
So we see that r has some rather interesting units, but constants often do...