Consider a cylinder of gas with a piston in one end. The piston can either be lo
ID: 2054728 • Letter: C
Question
Consider a cylinder of gas with a piston in one end. The piston can either be locked in place or slide freely. The cylinder is initially in equilibrium in a bath of ice water at a pressure of 1 atm and volume of 2 L. The piston is then locked in place and the cylinder of gas placed in a bath of boiling water and allowed to come to equilibrium. Then the piston is released and allowed to slowly move until the gas pressure is again 1 atm while the cylinder remains in the boiling water. Which of the PV diagrams below correctly illustrates these two processes?
A
B
C
D
E
F
Consider a cylinder of gas with a piston in one end. The piston can either be locked in place or slide freely. The cylinder is initially in equilibrium in a bath of ice water at a pressure of 1 atm and volume of 2 L. The piston is then locked in place and the cylinder of gas placed in a bath of boiling water and allowed to come to equilibrium. Then the piston is released and allowed to slowly move until the gas pressure is again 1 atm while the cylinder remains in the boiling water. Which of the PV diagrams below correctly illustrates these two processes? A B C D E FExplanation / Answer
(B) is the correct diagram. at first, piston is locked, so volume remains constant. as T increases , P also increases. Now, piston is left free, but temperature remains constant. P decreases back to one atm. => V increases. (Since it is isothermal process, therefore curve will be rectangular hyperbola as in B)
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