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Figure. Shows an ideal gas changing its ...

Figure. Shows an ideal gas changing its state `A` to state `C` by two different path `ABC` and `AC`.
a. Find the path along which the work done is the least.
b. The internal energy of the gas at `A` is `10 J` and the amount of heat supplied to change its state to `C` through the path `AC` is `200 J`. Find the internal energy at `C`.
c. The internal energy of the gas at state `B` is `20 J`. Find the amount of heat supplied to the gas to go from state `A` to state `B`.

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