10
QuizMultiple Choice

Liquids

Question 10 • IA-Chemistry A Survey of Chemistry A

Which postulate of the kinetic-molecular theory applies to the particles of a liquid?

Answer
A
They do not move freely but vibrate in a stationary position.
B
They can be compressed, which causes a large change in volume.
C
They have so much kinetic energy that their intermolecular forces are negligible.
D
They have enough kinetic energy to easily slide by each other.

Explanation

Liquid particles have enough kinetic energy to move around one another, so they can slide past each other while remaining close together. This describes choice D, “They have enough kinetic energy to easily slide by each other.” Choice A describes particles in a solid, while B and C describe properties associated with gases.

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