Finding final volume of gas?

Question

Two moles of an ideal gas initially at 224K and 0.55 atm are compressed to 1.55 atm. I have to find the final volume of the gas so first I found initial volume 67.72 then I found the final volume which was 0.024 in m^3 and I used 8.31451 as R and would it make a difference if it's an isothermal process?

Answer 1

You don't tell us the final temperature, but I assume from the way you ask that it is isothermal (temperature not changing).

You only want the final volume, so go straight to PV = nRT

P = 1.55 atm, n = 2, T = 224K, R = 8.31451 J mol-1 K-1 (always write in the units. It helps to keep you straight)

Take it from there

Answer 2

You probally want to use the combined gas laws because they deal with pressure and temperature and volume. Look up the combined gas law and you can figure out your formula using that.