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A thermodynamic system undergoes a cycli...

A thermodynamic system undergoes a cyclic process as shown in figure.
(a) over one complete cycle, does the system do positive or negative work.
(b) over one complete cycle, does heat flow into or out of the system.
(c) In each of the loops 1 and 2, does heat flow into or out of the system.

Text Solution

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The correct Answer is:
A, B, C
(a) `W_1=+ve`, as cycle is clockwise
`W_2=`-ve as cycle is anti-clockwise
Since, `|W_1|gt|W_2|`
`:.` Net work done by the system is positive.
(b) In cyclic process, `Q_(n et)=W_(n et)`
Since, `W_(n et)` is positive. So `Q_(n et)` is also positive. So, heat flows into the system.
(c) `W_1=Q_1=+ve`, so into the system.
`W_2=Q_2=-ve`, so out of the system.
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