Question detail

What happens to the average kinetic energy of gas particles when the temperature increases (Particle motion in gases)

Try the question, check the answer, then read the explanation to understand the curriculum point.

At a glance

MCQ

Type

practice

Style

Topic

Particle model and pressure

Question

  1. A. It decreases.
  2. B. It remains constant.
  3. C. It increases.
  4. D. It fluctuates randomly.

Answer

The correct answer is It increases..

Explanation

Particle lens: Describe arrangement, motion, spacing, collisions, or energy changes only when they are relevant here. This question asks: What happens to the average kinetic energy of gas particles when the temperature increases (Particle motion in gases). The correct response is It increases., because gas pressure comes from particle collisions with container walls. In Particle motion in gases, the marking point should connect directly to describe how increasing temperature increases the average kinetic energy of gas particles. If the question includes values, the working must keep the appropriate unit and operation; if it is an explanation, it must name the relevant particle behaviour or energy change. This item belongs to Particle model and pressure, so avoid answers that switch to a different quantity, confuse heat with temperature, or describe gas pressure without collisions when collisions are the reason. Checkpoint 480 is distinct because it uses this exact question context and the particle lens rather than a generic particle-model sentence.

Common mistake

Temperature and Kinetic Energy Confusion

Students often confuse temperature with the average kinetic energy of gas particles, thinking they are the same concept.

Remember that temperature is a measure of the average kinetic energy of the particles in a substance. Increasing temperature means the particles move faster, which increases their average kinetic energy.

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