Question

Air filled balloon kept inside the glass jar fitted with the vacuum pump what will be the change in the size of the balloon when air is taken out with the help of vacuum pump from the jar state the law which supports even answer

Answer 1

As others have already answered, the balloon will expand due to there being greater pressure inside the balloon than outside as air is removed from the jar. But, this answer does assume that the balloon has not been filled to capacity. If the balloon has reached its full size before the jar has been completely emptied of air, removing more air (and pressure) from the jar will cause the balloon to burst.

Now where this can get really interesting and fun is if the same experiment is done without the balloon being inflated and tied. Put the uninflated balloon into the jar/vacuum chamber so that the nozzle of the balloon is held open with a seal on the outside of the balloon nozzle. Now turn on your vacuum pump and the balloon will be fully inflated from the outside. In other words, you fill the balloon without directly blowing air into it but by removing air from the outside of it. You now have a fully inflated balloon that isn’t tied shut, allowing you to put whatever other objects you want inside the balloon.

If that’s not clear, let me know I’ll update when I have time to come up with pics or video. There are quite a few balloon stuffing machines (both commercial and DIY) that work with this principle. I’m just not finding good pics at the moment.

Answer 2

The size increases
Bowlers law:at constant pressure the volume of a fixed mass of a dry gas is inversely proportional to its pressure