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which statement is true about the particles of a gas when the gas changes into a liquid?

a. they stop vibrating
b. they move farther apart
c. there kinetic energy increases
d. the attractive force between them increases

D. The attractive force between them increases

Explanation:

When a gas changes into a liquid, the attractive forces between the particles are higher than the energy (in the form of temperature or pressure) received by the sistem so they will stay together forming the liquid.

A. They stop vibrating  - wrong, the particles will continue to vibrate

B. They move farther apart  - wrong, the particles will stick together

C. There kinetic energy increases  -  wrong, the kinetic energy decreases because of the attractive forces between the particles

D. The attractive force between them increases - true

D. The attractive force between them increases

Explanation:

Solid state : It is a state in which the particles are closely packed and does not have any space between them. This state have a definite shape and volume.

Liquid state : It is a state in which the particles are present in random and irregular pattern. The particles are closely arranged but they can move from one place to another. This state have a definite volume but does not have a fixed shape.

Gaseous state : It is a state in which the particles are loosely arranged and have a lot of space between them. This state have indefinite volume as well as shape.

Thus when particles of a gas changes into a liquid they come closer , the kinetic energy decreases and the attractive force between them increases.