Thermodynamics

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Consider a system consisting of two glass bulbs, each with volume V, and each containing n moles of gas. Bulb A contains nA moles of A and bulb B contains nB moles of B (a different gas), nA = nB. The bulbs are connected by a closed stopcock. The stopcock is opened so that the gases are free to move between the bulbs. What is the change in entropy between initial (stopcock closed) and final (stopcock open) states?

Consider the same system as problem above – except that bulb B now contains nA moles of A rather than nB moles of B. The stopcock is opened so that the gases are free to move between the bulbs. What is the change in entropy between initial (stopcock closed) and final (stopcock open) states?

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