problem19_18

# University Physics with Modern Physics with Mastering Physics (11th Edition)

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19.18: a), b) The clockwise loop (I) encloses a larger area in the p-V plane than the counterclockwise loop (II). Clockwise loops represent positive work and counterclockwise loops negative work, so . 0 and 0 II I < W W Over one complete cycle, the net work , 0 II I + W W and the net work done by the system is positive. c) For the complete cycle, . so and 0 Q W U
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Unformatted text preview: = = From part (a), W &amp;gt; 0 so Q &amp;gt; 0, and heat flows into the system. d) Consider each loop as beginning and ending at the intersection point of the loops. Around each loop, . and then, ; so , II II I I &amp;lt; = = = = W Q W Q W Q U Heat flows into the system for loop I and out of the system for loop II....
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