Aballoon at 32 °c is filled with 21 l of air. what would its volume be at a temperature of 52 °c, assuming pressure remains constant?
a.)19 l
b.)22 l
c.)24 l
d.)25 l

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?