00:02
Hi there.
00:03
To answer this question, i want to start out by talking about two gas laws.
00:08
One is boyle's law.
00:12
Boils law tells us that when number of moles of a gas and temperature are constant, the pressure and the volume are inversely proportional.
00:26
So as one goes up, the other goes down proportionally.
00:36
The other gas law i want to talk about is galusac's law, which relates to.
00:43
Temperature and pressure.
00:52
Gaylu -sack's law says that when the number of moles of a gas and the volume are constant, the kelvin temperature, and the pressure are directly proportional.
01:05
So as one goes up, the other goes up, as one goes down, the other goes down.
01:19
So we're told that for the sample of gas, so n is going to be constant, since it's just a sample of gas.
01:28
We're not changing the number of moles.
01:36
We're told its temperature is doubled.
01:40
So we're doubling its temperature, and we're doubling its volume.
01:46
Well, based upon these two relationships, if we double the volume, the pressure is going to be cut in half.
01:53
If we double the temperature, the pressure is going to be doubled.
01:56
So we would expect no change.
02:01
But we can also look at this with a chemical, or with an equation.
02:05
We can use the combined gas law.
02:07
Combined gas law says p1 times v1 over t1 equals p2 times v2 over t2.
02:19
All right.
02:20
Well, pv and t are pressure, volume, and temperature.
02:23
The ones are the initial conditions, and the twos are the new conditions...