Question: Suppose four gas molecules are placed in the left flask in Figure 19.6(a). Initially, the right flask is evacuated and the stopcock is closed. (a)

Suppose four gas molecules are placed in the left flask in Figure 19.6(a). Initially, the right flask is evacuated and the stopcock is closed.
(a) After the stopcock is opened, how many different arrangements of the molecules are possible?
(b) How many of the arrangements from part (a) have all the molecules in the left flask?
(c) How does the answer to part (b) explain the spontaneous expansion of the gas?

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