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JAMB Chemistry 2014 Question 5

Question 5

Gas Laws

200 cm3 of a gas at 25 °C exerts a pressure of 700 mmHg. Calculate its pressure if its volume increases to 350 cm3 at 75 °C.

  1. A.342.53 mmHg
  2. B.1430.54 mmHg
  3. C.467.11 mmHg
  4. D.400.00 mmHg
Show the answer and explanation

Answer: C (467.11 mmHg)

Explanation

P1V1/T1 = P2V2/T2: P2 = (700 × 200 × 348)/(298 × 350) = 467.11 mmHg (temperatures in kelvin).