This is the equation I'm talking about: PV = nRT So say I had a bit of Ideal Gas in a completely insulated elastic balloon, and I raised a temperature just a little bit. PV = nR(2T) Because this is an elastic balloon, would the volume also double? P(2V) = nR(2T) But what if the balloon is really tight? Would the pressure increase because the volume couldn't expand as much? But to what extent? How much would the balloon expand? (?P)(?V) = nR(2T) There has to be a sort of limit, depending on the stretchiness of the balloon, right?