A gas can be taken from A to B via two different processes ACB and… | JEE Main 2019 (9 Jan, Shift 1)

Q61JEE Main 2019 · 9 JAN · SHIFT 1Medium

P-V Diagrams & Cyclic Processes

A gas can be taken from A to B via two different processes ACB and ADB.

When path ACB is used 60 J of heat flows into the system and 30 J of work is done by the system. If path ADB is used work done by the system is 10 J. The heat Flow into the system in path ADB is:

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Answer: (a)

Path ACB: $\Delta U = Q - W = 60 - 30 = 30\ \text{J}$ .
Path ADB: $Q = \Delta U + W = 30 + 10 = 40\ \text{J}$
So the answer is (a) 40 J.

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