Not a question to be solved, just an understanding of interpretation required.(adsbygoogle = window.adsbygoogle || []).push({});

In thermodynamics when a question is asked regarding cylinder pressures, so say a cylinder contained a gas pressure of 600Kpa, when a question asks for you to conclude say How Much A Spring is Compressed, does the pressure take into consideration the area of the cylinder?

Now the above may not sound briliant, but if the compressed gas was pushing on a piston which had a spring attached, so the spring constant was say 4.8 kN/m, does the following solution seem to be worked out correctly.

PA - P atm A = K spring change in x

(600 000 - 100 000)pie x 0.05 squared = 4800 change in x = 0.818m

I know the maths is ok, I am concerned about my interpretation of the equation above, and whether PA should have the area of the cylinder included or is already included in the pressure?

Please advise if you can

David

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# Does the pressure take into consideration the area of the cylinder?

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