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

  • Thread starter mrcotton
  • Start date
120
0
1. Homework Statement
pumpQ_zpsfbc48895.jpg



2. Homework Equations
At constant temperature
then P1V1=P2V2

3. 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:

Answers and Replies

Andrew Mason
Science Advisor
Homework Helper
7,540
317
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
 
120
0
Andrew your a star, I would never have seen that.
Thanks again for your help
D
 

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