00:01
This problem gives us a compressed air tank, so just a bunch of gas molecules, and it tells us that the volume is 8 liters, the pressure is 140 atm, and the original temperature is 20 degrees celsius.
00:13
So these are all the original conditions.
00:15
It's asking us to find the final volume if it's at stp.
00:19
And so this is kind of, the final conditions are kind of hidden within stp.
00:25
So you need to know what that means.
00:26
So that means standard temperature and pressure.
00:28
So the temperature final is equal to 270 kelvin because that's just by definition.
00:38
And the pressure is equal to 1 atm.
00:42
And so now we can just use the ideal gas law to find the final volume.
00:48
So pv equals nrt.
00:52
So we're given pressure, volume, and temperature...