What happens to a football which is inflated in a warm room, is used to play outside in cold weather?
Correct answer: B. It will deflate due to contraction of the air molecules
- A. It will expand due to expansion of the air molecules
- B. It will deflate due to contraction of the air molecules
- C. Its size will not be affected by the change in temperature
- D. It will burst.
Explanation
When the football is inflated in a warm room, the air molecules inside the ball are moving rapidly and are spaced farther apart, occupying more volume. As the ball is taken outside into cold weather, the air molecules slow down and move closer together, occupying less volume. This contraction of air molecules causes the pressure inside the ball to decrease, resulting in a deflation of the ball.
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Thermal equilibrium means that bodies in contact have the same temperature and no net heat flows between them. The topic distinguishes heat from temperature, uses the zeroth law of thermodynamics, and covers heat transfer, specific heat capacity, thermal expansion and the conditions for reaching equilibrium.
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