00:01
Hi, so we have here the given question.
00:05
We have a 20 -liter vessel that is filled with gas a and b, and we're given with the number of moles of a and the number of moles of b as well.
00:16
And we're also given with the temperature, and we need to calculate the total pressure.
00:21
First, we will calculate the total number of moles in the vessel.
00:26
We'll call that n sub -t.
00:28
So we'll add the number of moles of gas a, which is 9.
00:31
Point two five plus the number of moles of gas b which is eight moles so adding these two numbers nine point two five plus eight is seventeen point two five moles so now we will use the ideal gas law equation pv is equivalent to nr t wherein p is the pressure v is volume and is the number of moles r is the ideal gas constant and t is the temperature in order to solve for pressure we'll just rearrange this.
01:04
We'll have n -r -t over volume.
01:07
So plug in the values that we have.
01:09
The total number of moles is 17 .25.
01:13
Now the ideal gas constant is 0 .0 821 liters atm per mole kelvin.
01:20
So you can look this up in standard reference materials or you could memorize this value as well.
01:25
Now, the temperature is in terms of degrees celsius.
01:29
We have to convert this to kelvin...