If the absolute temperature of a gas is doubled and the pressure of the gas is halved how will the volume change? Will it increase by 4 times its original value or will it decrease to one forth of its original value

Are you familiar with the Ideal Gas law?



Rearrange it:

Given the number of moles of gas is constant, then is a constant. Hence:



So if , and , what value must be?

Thanks a lot, I was solving it the wrong way. Now, I got it right.