. A 20 litre container at 400 K contains
CO2(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 CO2 attains its maximum value, will be
(Given that : SrCO3s → SrO(s) + CO2(g), Kp = 1.6 atm )
(a) 10 litre
(b) 4 litre
(c) 2 litre
(d) 5 litre
Best Answer
Correct Option is : (d)
Max. pressure of CO2 = Pressure of CO2 at equilibrium
For reaction, SrCO3( s)⇌SrO(s) + CO2
Kp = PCO2 = 1.6 atm= maximum pressure of CO2
Volume of container at this stage, V= nRT/ P...(i)
Since container is sealed and reaction was not earlier at equilibrium
∴ n= constant
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