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JAMB Physics 1993 Question 16

Question 16

Gas Laws

When the volume of a given mass of gas is halved and its temperature doubled, the pressure

  1. A.remains constant
  2. B.increases by a factor of 4
  3. C.increases by a factor of 3
  4. D.decreases by a factor of 4.
Show the answer and explanation

Answer: B (increases by a factor of 4)

Explanation

pV/T is constant, so p ∝ T/V. Doubling T and halving V multiplies p by 2 × 2 = 4.