What does the particle model say about temperature increase?

What does the particle model say about temperature increase?

• A. Particles lose energy and slow down.
• B. Dissociation of molecules occurs.
• C. Collisions cease.
• D. Particles gain energy, move faster, leading to more collisions.

Answer: (D)

Temperature reflects the average kinetic energy of particles. When temperature rises, particles gain energy and move faster, which leads to more frequent and more energetic collisions. This explains why heating a gas increases its pressure at a fixed volume and can speed up chemical reactions. The other ideas don’t fit: a temperature rise doesn’t cause particles to lose energy or for collisions to stop, and while high temperatures can break bonds in some cases, that’s not the general consequence of a temperature increase.

Temperature reflects the average kinetic energy of particles. When temperature rises, particles gain energy and move faster, which leads to more frequent and more energetic collisions. This explains why heating a gas increases its pressure at a fixed volume and can speed up chemical reactions. The other ideas don’t fit: a temperature rise doesn’t cause particles to lose energy or for collisions to stop, and while high temperatures can break bonds in some cases, that’s not the general consequence of a temperature increase.