Question

I am having a really hard time figuring this question out, would somebody be able to help me?

Imagine a giant dry-cleaner's bag full of air at a temperature of -35∘C floating like a balloon with a string hanging from it 12km above the ground.
Estimate what its temperature would be if you were able to yank it suddenly back to Earth's surface.

Answer 1

since V stays constant,
figure the pressure change.
T(°K) is directly proportional to pressure.