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Question

The stop cock connecting two bulbs of volume 5 litre and 10 litre containing an ideal gas at 9 atm and 6 atm respectively, is opened. What is the final pressure in the two bulbs if the temperature remains the same?

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Solution

Applying mole conservation,
P1V1+P2V2=PR(V1+V2)
9×5+6×10=PR(15)
PR=7 atm
where, PR= resultant pressure after mixing

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