New pressure of a gas when the volume changes at const Temperature

AI Thread Summary
The discussion revolves around the gas pressure change when volume varies at constant temperature, utilizing the equation P1V1=P2V2. A participant expresses confusion regarding the solution and suspects a typo in the question, specifically about the volume in the pump chamber being incorrectly stated. They propose that if the pump chamber's volume were 6.5 x 10-5 m3, the provided answer would align correctly. Another participant acknowledges this insight, emphasizing its significance in resolving the issue. The conversation highlights the importance of accurate volume specifications in gas law problems.
mrcotton
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Homework Statement


pumpQ_zpsfbc48895.jpg

Homework Equations


At constant temperature
then P1V1=P2V2

The Attempt at a Solution


This is my attempt at the solution
pumpA_zpscb71ca03.jpg


however the mark scheme says

pumpMS_zps50532314.jpg


Any help appreciated?
I just can't see what I am not seeing?
 
Last edited:
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I think there is a typo in the question. The volume in the bottle is much greater than the volume in the pump chamber in this diagram. I suspect that the questioner intended the volume of space in the pump chamber to be 6.5 x 10-5 m3 (.065 l). If that were the case, the given answer is correct.

AM
 
Andrew your a star, I would never have seen that.
Thanks again for your help
D
 

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