Calculate Pressure When V2 Changes: PVT Relationships

[db1]

How do i calculate pressure?

P1 = 3atm .... P2 = ?
V1 = 4 m3...V2 = 2 m3(half original)
T1 = 300k...T2 = 400

how do i calculate pressure when V2 changes?

Thanks for any help

 

[skaboy607]

You need to give a bit more on the problem? What fluid are you using?

 

[db1]

just says a quantity of gas

 

[skaboy607]

I'll assume that they want to use the ideal gas law to solve then.

 

[db1]

P2 = 8atm, I am just not sure how to work it out

 

[skaboy607]

You have a gas at two states; let's call it state 1 and state 2.

Ideal gas law is pV=mRT where R is universal gas constant of 8314.

You have all the parameters for state 1 apart from the mass. Once you know this you will know all the parameters for state 2 apart from the pressure. Plug in the numbers and there's your answer.

 

[db1]

its just talking about the combined gas equation PV/T= constant

it isn't saying anything about m or R yet

 

[skaboy607]

Well then it is even easier!

PV/t=constant so for state 1, obtain an aswer (this is constant) then rearrange for V and plug in the values for state 2.

 

[db1]

have it now, thanks for your help