00:01
Two parts to this question.
00:02
So first we're going to start with our volume, which is, we'll call this our initial volume, which is 5 litres.
00:09
And temperature initial, 25 degrees celsius, which is equivalent to 298 kelvin.
00:16
And 1 atmosphere pressure.
00:20
So we want to find the number of moles here.
00:22
So our ideal gas, pv is equal to nrt, our number of moles is equal to pv over rt.
00:28
Pressure is 1 atmosphere, volume is 5 .00 litres, and this is the initial number of moles here.
00:40
R is 0 .08206 litre atmosphere per mole kelvin, and 298 kelvin.
00:49
So we've got 1 times 5 divided by 0 .08206 divided by 298, and that's 0 .204 moles.
01:00
That's the initial number of moles...