A gas undergoes the cycle of pressure and volume changes W --> X --> Y --> Z --> W shown in the diagram.What is the net work done by the gas
Correct answer: C. 200J
- A. -600J
- B. 0J
- C. 200J
- D. -200J
Explanation
The net work done by the gas in a cyclic process is equal to the area enclosed by the cycle on the P-V diagram. In this case, this area can be calculated as 200J, indicating work done by the gas. Since the process follows a clockwise path, the work is positive. Option C is correct as it matches this calculation.Option A (-600J) assumes an incorrect magnitude and sign. Option B (0J) is incorrect because there is a non-zero area enclosed by the cycle. Option D (-200J) has the incorrect sign, as the cycle's clockwise direction indicates positive work done by the gas.
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Thermal equilibrium and heat explain how temperature and energy transfer are related, while molar specific heats describe the heat required by a gas at constant volume or constant pressure. The first law connects heat supplied, work done and change in internal energy, with sign conventions kept distinct from temperature changes.
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