00:02
Hello, in this question we are told that the amount of gas, or in other words the number of moles and the pressure are constant while the temperature and the volume are changing.
00:15
So this relationship is described by charles law.
00:20
Charles law is the gas law that tells us when the number of moles and pressure are constant the volume and the absolute or kelvin temperature are directly proportional.
00:41
What that means is as one goes up the other goes up as one goes down the other goes down.
00:47
So that would be a direct proportion.
00:51
The equation that represents this direct proportion of charles law is v1 over t1 equals v2 over t2 where v is volume, t is temperature, but it's absolute temperature.
01:05
In other words kelvin temperature.
01:07
If you don't use kelvin temperature the answer will be incorrect.
01:11
The ones represent the initial conditions and the twos represent the new conditions.
01:16
So let's go ahead and pull the information out of the problem.
01:20
Our initial volume is 2500 milliliters.
01:27
T1 is 76 degrees, but that is celsius and we just said we can't use celsius in this problem.
01:34
So we have to convert this to kelvin.
01:36
We can do that by adding 273...