Two identical cylinders confine an equal number of moles of ideal gases, one of
ID: 1770915 • Letter: T
Question
Two identical cylinders confine an equal number of moles of ideal gases, one of those gases being helium (He) and the other molecular oxygen (O 2 ). The cylinders are both thermally insulated from their surroundings (except where indicated below), and are both sealed on top by movable pistons with the same weight. Both cylinders start at room temperature (stage A), are given equal amounts of heat (stage B), and are then placed in thermal contact with each other so that they can exchange heat between them until they are in thermal equilibrium with each other (stage C). Which of the series of diagrams below best describes the motion of the piston between these three stages?
stage A Stage B stage C a. He He He b. He He He He He He He He He He He HeExplanation / Answer
Option B decribes the motion of the piston.
Because Oxygen(O2 ) is more expand than Helium(He) when equal amount of heat supplied.
Generally in Free Expansion of gases all gase shows cooling effect EXpect H and He.
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