00:01
All righty, so today we're looking at a problem in which we have helium gas that has a volume of 29 .2 milliliters and that as a at a pressure of 785 millimeters mercury.
00:11
And then if we compress this gas until it has a volume of only 15 .1 millimeters, we want to know what the new pressure is.
00:19
And so we're going to use boyle's law to do that because that can relate a change in volume to a change in pressure at constant temperature for us.
00:28
And it does give us in the problem that this is occurring at constant temperature.
00:31
So that's a big clue that we should be using boyle's law.
00:34
And so let's go through and find all of our conditions.
00:37
So we have an initial volume of 29 .2 millimeters.
00:40
So that will be our v1.
00:42
So 29 .2 millimeters.
00:45
And then we know that our initial pressure is 785 millimeters mercury.
00:48
So that'll be our p1.
00:54
And then we want to know the new pressure...