Chemistry - Individual Gas Laws

Question

A sample of gas is put into a container with a movable piston that will allow pressure to be maintained. If the sample of gas was initially at 20.5 degrees Celcius and occupied a volume of 3.30 L, what temperature would the sample be if the piston changed the volume to 80.8 L?

Answer in Celsius

Answer 1

Looking at PV = nRT, you can see that V is proportional to T with P and n fixed. This is also called Charles' Law.

Whenever you use one of the gas laws proportionally, you must be in absolute units. Usually, temperature must be adjusted from C to K: K = °C + 273.15.

V₂/V₁ = T₂/T₁ or, the form I prefer: T₂ = T₁(V₂/V₁) = 293.65K(80.8 liters/3.30 liters)

Note that you still have to convert back to Celsius. The beauty of this method is that you can use any volume units , as long as they are the same.

Please consider a tutor. Take care.