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An ideal gas is taken round a cyclci the...

An ideal gas is taken round a cyclci thermodynamic process ABCA as shown if Fig. If the internal energy of the gas at point A is assumed zero while at B it is 50 J. The heat absorbed by the gas in the process BC is 90 J.
(a) What is the internal energy og the gas at point C ?
(b) How much heat energy is absorbed by the gas in the process AB?
(c ) Find the heat energy rejected or absorbed by the gas in the process CA.
(d) What is the net work done by the gas in the complete cycle ABCA ?

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