JAMB Chemistry 1987 Question 5

Question 5

Gas Laws

If the quantity of oxygen occupying a 2.76 litre container at a pressure of 0.825 atmospheres and 300 K is reduced by one-half, what is the pressure exerted by the remaining gas?

  1. A.1.650 atm
  2. B.0.825 atm
  3. C.0.413 atm
  4. D.0.275 atm
Show the answer and explanation

Answer: C (0.413 atm)

Explanation

At fixed volume and temperature, pressure is proportional to the amount of gas. Halving the gas halves the pressure: 0.825/2 = 0.413 atm.