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JAMB Chemistry 1992 Question 8

Question 8

Gas Laws

An increase in temperature causes an increase in the pressure of a gas in a fixed volume due to an increase in the

  1. A.number of molecules of the gas
  2. B.density of the gas molecules
  3. C.number of collisions between the gas molecules
  4. D.number of collisions between the gas molecules and the walls of the container
Show the answer and explanation

Answer: D (number of collisions between the gas molecules and the walls of the container)

Explanation

Gas pressure comes from molecules hitting the container walls. Hotter molecules move faster and hit the walls more often and harder, so pressure rises.