Weight of a piston

  • Thread starter james brug
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  • #1
james brug
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Homework Statement



A vertical cylindrical tank contains 1.80 mol of an ideal gas under a pressure of 1.05 atm at 22.0[tex]^\circ[/tex] C. The round part of the tank has a radius of 10.0 cm , and the gas is supporting a piston that can move up and down in the cylinder without friction.

What is the mass of this piston?

Homework Equations



pV=nRT

The Attempt at a Solution



[tex].05*1 \; atm*.01\pi \: m^2/9.8 \approx 16.2 kg [/tex]
 

Answers and Replies

  • #2
Andrew Mason
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Homework Statement



A vertical cylindrical tank contains 1.80 mol of an ideal gas under a pressure of 1.05 atm at 22.0[tex]^\circ[/tex] C. The round part of the tank has a radius of 10.0 cm , and the gas is supporting a piston that can move up and down in the cylinder without friction.

What is the mass of this piston?

Homework Equations



pV=nRT

The Attempt at a Solution



[tex].05*1 \; atm*.01\pi \: m^2/9.8 \approx 16.2 kg [/tex]
What determines the pressure of the gas in the cylinder? How much of that force (per unit area) is due to the weight of the pistion?

AM
 

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