O-LevelPhysicsThermal Physics5054/11 · May/June 2012 · Q151 Mark
A gas is enclosed in a container of fixed volume. It gains heat energy from an external source. What happens to the molecules of the gas?
AThey expand.
BThey move faster inside the container.
CThey move further apart.
DThey vibrate with greater frequency.
✓ Correct answer
B: They move faster inside the container.
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