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  4. Figure shows four, p-V diagram for the given sample of gas. In which case no exchange of heat occurs with the sample?

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Q. Figure shows four, p-V diagram for the given sample of gas. In which case no exchange of heat occurs with the sample?Physics Question Image

Rajasthan PMTRajasthan PMT 2009Thermodynamics

Solution:

For $ p-V $ diagrams $ P $ and $ Q $ pressure increases with increase in volume. This is possible when the temperature of the gas increases. Hence, exchange of heat takes place. For $ p-V $ diagrams, $ R $ and $ S $ pressure decreases with increase in volume but the slope of curve is larger for $ S $ . Therefore, it is for an adiabatic process for which no exchange of heat takes place.