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JAMB Physics 1983 Question 14

Question 14

Gas Laws

If the pressure on 100 cm3 of an ideal gas is doubled while its Kelvin temperature is halved, then the new volume of the gas will become

  1. A.25 cm3
  2. B.50 cm3
  3. C.100 cm3
  4. D.200 cm3
  5. E.400 cm3.
Show the answer and explanation

Answer: A (25 cm3)

Explanation

V ∝ T/p. Halving T halves V, and doubling p halves it again: 100 × ½ × ½ = 25 cm3.