Q. A 20 litre container at 400 K contains $CO_2(g)$ at pressure 0.4 atm and an excess of SrO (neglect the volume of solid SrO). The volume of the container is now decreased by moving the movable piston fitted in the container. The maximum volume of the container, when pressure of $CO_2$ attains its maximum value, will be : (Given that : $SrCO_3(s) \rightleftharpoons SrO(s) + CO_2(g)$, $K_p$ = 1.6 atm)
A) 5 litre
B) 10 litre
C) 4 litre
D) 2 litre
Explanation
[Solution] The maximum $CO_2$ pressure is $K_p$ = 1.6 atm. At constant T and moles, $PV$ = constant: $0.4 \times 20 = 1.6 \times V$, so V = 5 L. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.