JAMB Physics 1985 Question 20

Question 20

Gas Laws

A quantity of gas occupies a certain volume when the temperature is −73°C and the pressure is 1.5 atmospheres. If the pressure is increased to 4.5 atmospheres and the volume is halved at the same time, what will be the new temperature of the gas?

  1. A.573°C
  2. B.327°C
  3. C.300°C
  4. D.110°C
  5. E.27°C
Show the answer and explanation

Answer: E (27°C)

Explanation

T2 = T1 × (p2V2)/(p1V1) = 200 K × (4.5 × ½)/1.5 = 300 K = 27°C.