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PhysicsHeat & ThermoThermodynamics Laws & Specific Heats of GasesMedium2 minQB

PhysicsMediumsingle choice

An ideal gas goes through the cycle ABCD on a $P$ - $V$ diagram: A to B isobaric expansion, B to C isothermal expansion, C to D isochoric cooling, and D to A isothermal compression (A and D at the same temperature). Which description of the same cycle on a $V$ - $T$ graph ( $T$ horizontal, $V$ vertical) is correct?

Options:

Answer:

Solution:

Isobaric: $V \propto T$ , a line through the origin (AB, $T$ rises). Isothermal: $T$ fixed, so BC and DA are vertical. Isochoric: $V$ fixed, so CD is horizontal with $T$ falling to $T_{A}$ .

Subject:PhysicsTopic:Heat & ThermoSubtopic:Thermodynamics Laws & Specific Heats of Gases

⏱ 2mℹ️ Source: QB

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