Which best describes the transition from gas to liquid?

Energy must be removed because particles in liquid move more slowly.

Energy must be added because particles in liquid move more quickly.

Energy is neither added nor removed in this phase transition.

Energy is either removed or added, depending on the type of particles.

Answer: Option (a) is the correct answer.

Explanation:

In gaseous state, molecules move rapidly from one place to another as the molecules have high energy.

So, when gaseous state changes into liquid state then molecules slow down in speed because of decrease in energy molecules come slightly closer to each other.

For example, during condensation of water, vapors change into liquid.

Thus, we can conclude that energy must be removed because particles in liquid move more slowly best describes the transition from gas to liquid.

A - its condensation and gas particles have a higher kinetic energy