Question 36
Gas LawsA balloon inflated with helium gas at ground level is released. As it rises through a constant temperature atmosphere,
- A.its pressure reduces but volume remains constant
- B.the product of pressure and volume remains constant
- C.both pressure and volume increase
- D.its pressure remains constant but the volume decreases
- E.both pressure and volume remain constant.
Show the answer and explanation
Answer: B (the product of pressure and volume remains constant)
Explanation
At constant temperature Boyle's law applies: as the outside pressure falls the balloon expands, but pV stays constant.