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Physics-

General

Easy

Question

Three processes form a thermodynamic cycle as shown on P-V diagram for an ideal gas. Process 1 $rightwards arrow$ 2 takes place at constant temperature (300K). Process 2 $rightwards arrow$ 3 takes place at constant volume. During this process 40J of heat leaves the system. Process 3 $rightwards arrow$ 1 is adiabatic and temperature T₃ is 275K. Work done by the gas during the process 3 $rightwards arrow$ 1 is

-40J
-20J
+40J
+20J

The correct answer is: -40J

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