Question

Apply the kinetic molecular theory to predict the outcome regarding the gas shown at right under each of the conditions below by filling in “increases” or “decreases” in the space provided.

1. If temperature is increased, the number of collisions per second
.
2. If volume is increased, the number of collisions per second
.
3. If the number of particles is increased, the number of collisions per second
.

Answer 1

1. Increases
2. Decreases
3. Increases

Brief reasoning: Higher T → faster particles → more collisions. Larger V (at constant T and n) → particles travel farther between collisions → fewer collisions per second. More particles → more collisions occur.