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Class26

# Class26 - A monatomic ideal gas maintains a constant...

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3/7/12 Oregon State University PH 202, Lecture 26 1 A monatomic ideal gas maintains a constant temperature as 4700 J of heat flows into it. Using the usual sign conventions, what is the work done in this process? 1. –4700 J 2. 4700 J 3. 0 J 4. There is not enough information to answer. 5. None of the above . (What if the heat flow had been the other way?)

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3/7/12 Oregon State University PH 202, Lecture 26 2 2.00 moles of a monatomic ideal gas expands adiabatically, doing 831 J of work in the process. Find the resulting temperature change, T , of the gas. 1. –33.3 K 2. 33.3 K 3. 41.6 K 4. –41.6 K 5. None of the above . (No heat flowed out of the gas. How is this result possible?)
3/7/12 Oregon State University PH 202, Lecture 26 3 Q: Is it possible to let heat flow into a gas and yet it cools down (drops in temperature) in this process? If so, draw an example P-V diagram of such a process. (It’s not necessarily one of the four simple processes we are studying.)

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3/7/12 Oregon State University PH 202, Lecture 26 4 Q: Is it possible to let heat flow out of a gas and yet it warms up (rises in temperature) in this process?

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Class26 - A monatomic ideal gas maintains a constant...

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