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JAMB Chemistry 1979 Question 45

Question 45

Gas Laws

A gas occupies 30.0 dm3 at S.T.P. What volume would it occupy at 91°C and 380 mm Hg?

  1. A.20.0dm3
  2. B.40.0dm3
  3. C.60.0dm3
  4. D.80.0dm3
  5. E.100.0dm3
Show the answer and explanation

Answer: D (80.0dm3)

Explanation

V2 = V1 × (P1/P2) × (T2/T1) = 30 × (760/380) × (364/273) = 30 × 2 × 1.33 = 80 dm3.