Figure shows a cyclic process performed on one mole of an ideal gas. A total of 1000 J of heat is withdrawn from the gas in a complete cycle. Find the work done on/by the gas, in joule, during the process BC. Given R = 8.3 J mol-1 K-1
For a cyclic process,
……..(1)
where, …….(2)
Process CA is isochoric, hence
Process A B is isobaric, as its T-V graph is a straight line passing through origin.
In an isobaric process, work done is
is positive, so expansion of gas takes place.
From equations (1), (2) and (3), we get
Negative work done implies that compression of the gas takes place or work is done on the system/gas.
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In the given graph, an ideal gas can change its state from A to C by two paths ABC or AC. Taking, the internal energy of gas at ‘A’ is 10 J, mark the CORRECT option(s)
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