Question

which best compares the temperatures of the substances? substance x has the highest temperature because its particles have more kinetic energy. substance x has the highest temperature because it has fewer particles. substance y has the highest temperature because its particles have more kinetic energy. substance y has the highest temperature because it has more particles.

Explanation:

Step1: Recall temperature - kinetic energy relation

Temperature is a measure of the average kinetic energy of the particles in a substance. More kinetic energy means higher temperature.

Step2: Analyze particle motion in X and Y

The particles in substance Y appear to be more closely - packed and less mobile compared to substance X. Substance X has particles with more space between them and they seem to be more free - moving, indicating higher kinetic energy.

Answer:

Substance X has the highest temperature because its particles have more kinetic energy.