First slide

Thermodynamic processes

Question

For one complete cycle of a thermodynamic process on a gas as shown in the P – V diagram. Which of following is correct

Moderate

A

$Δ E_{int} = 0, Q < 0$
B

$Δ E_{int} = 0, Q > 0$
C

$Δ E_{int} > 0, Q < 0$
D

$Δ E_{int} < 0, Q > 0$

Solution

$Δ E_{int} = 0,$ for a complete cycle and for given cycle work done is negative, So from first law of thermodynamics Q will be negative i.e, Q < 0.

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