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The quantity of heat required to take a system from \(\mathrm{A}\) to \(\mathrm{C}\) through the process \(\mathrm{ABC}\) is \(20\) cal. The quantity of heat required to go from \(\mathrm{A}\) to \(\mathrm{C}\) directly is:
 

1. \(20\) cal 2. \(24.2\) cal
3. \(21\) cal 4. \(23\) cal
Subtopic:  Cyclic Process |
Level 3: 35%-60%
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