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JAMB Chemistry 1988 Question 7

Question 7

Gas Laws

An increase in temperature causes an increase in the pressure of a gas because there is an increase in the

  1. A.average velocity of the molecules
  2. B.number of collisions between the molecules
  3. C.density of the molecules
  4. D.free mean path between each molecule and the other.
Show the answer and explanation

Answer: A (average velocity of the molecules)

Explanation

Heating gives the molecules more kinetic energy, so they move faster. Faster molecules hit the container walls more often and harder, which raises the pressure.