Posted by Carl on Sunday, November 21, 2010 at 9:25pm.
A cylinder with a valve at the bottom is filled with an ideal gas. The valve is now opened and some of the gas escapes slowly. The valve is then closed, after which the piston is observed to be at a lower position. Assume that the system is in thermal equilibrium with the surroundings at all times.
a) Is the final pressure of the gas in the cylinder greater than, less than, or equal to the initial pressure? Explain.
Explain how your answer is consistent with the forces acting on the piston in the initial and final states.
b) In this process, which of the quantities P, V, n, and T are held constant and which are allowed to change?
c) Consider the following incorrect student statement.
"In the ideal gas law, P=nRT/V, so the pressure is inversely proportional to the volume. If you decrease the volume, the pressure has to go up."
What is the flaw in the student's reasoning?
d) Explain why it is not possible to use the ideal gas law to determine whether the pressure changed in this process.
No one has answered this question yet.
Answer this Question
Related Questions
Physics - A cylinder with a valve at the bottom is filled with an ideal gas. The...
physics - Container with movable piston at top and valve near bottom is filled ...
science - A 70 liter tank containing an ideal gas at a pressure of 40 ...
chemistry - Two gases are contained in gas bulbs connected by a valve. Gas A is ...
Thermodynamics - Water vapor was flowing through the pipeline at 0,8 MPa ...
physics - An open-topped tank completely filled with water has a release valve ...
physics - An open-topped tank completely filled with water has a release valve ...
physics - An open-topped tank completely filled with water has a release valve ...
AP chem - An apparatus consists of a 4 L flask containing nitrogen gas at 32C ...
physics - Two identical containers are open at the top and are connected at the ...
For Further Reading
