Explain the expansion and contraction in liquids with the help of an example.
C.B.S.E Grade 6
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Expansion
When a liquid is heated, its molecules gain kinetic energy and vibrate more vigorously. As the vibration become larger, the molecules are pushed further apart and the liquid expands slightly in all directions.
When pressure is constant, the volume of a gas is directly proportional to the Kelvin temperature (Charlie's Law).When the temperature of a gas is increased, the molecules move faster and the collisions become more violent thus they spread away from each other causing the volume to increase.
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