A truck was carrying a substance in a tank. The molecules of that substance were moving away from each other . The truck parked overnight in a place where energy transferred out of the substance

The missing parts of the question and options are:

In the morning, the substance was a gas. How were the molecules moving in the morning?

a. They were moving more slowly away from each other.

b. They were moving more slowly in place.

c. They were moving more slowly around each other.

d. They were moving more quickly around each other.

The substance cooled down, but why was it still a gas?

a. The molecules are so attracted to each other that they need much more energy transferred in to change phase.

b. The molecules are so attracted to each other that they need more energy transferred out to change phase.

c. The molecules are not very attracted to each other, so they need much more energy transferred out to change phase.

d. The molecules are not very attracted to each other, so they need much more energy transferred in to change phase.

a. They were moving more slowly away from each other

c. The molecules are not very attracted to each other, so they need much more energy transferred out to change phase.

Explanation:

If the substance is a gas, the molecules collide with each other, and they drift apart. The intermolecular forces between molecules are weak. As a result, when they bump with each other, they do not get attached. Usually, in a gas, the molecules move fast in all directions, and they gain energy with their collisions. However, in this case, they move slowly because the substance lost energy overnight. If the substance loses more energy, it becomes a liquid, and its molecules would be more attracted to each other.

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