A balloon is filled to a volume of 5.0 L indoors at a temperature of 25oC. The volume of the balloon is expected to decrease when it is taken outside where the temperature is 0oC.

Answer 1

Correct. The volume of the balloon will decrease, as according to the Ideal Gas Law, PV=nRT, with a constant pressure on the balloon, the absolute temperature is proportional to the volume. In other words, the higher the temperature, the greater the volume. The lower the temperature, the lesser the volume. At zero degrees, the balloon will shrink.