The state of a thermodynamic system change from A to B adiabatically and in this process 500 J of work is done on the system. Now the state of same system is changed from A to B by means of another process and in this process 120 J of heat is supplied to system, then -
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Q = 0, W = – 500
Q = Δ U + Δ W
0 = Δ U – 500
Δ U = 500 joule
system is taken from A to B and T B > T A as Δ V is positive
for new processes
Q 1 = Δ U + W 1
120 = 500 + W 1
W 1 = – 380 new process is not isobaric, isochoric and not isothermal. It would be polytrophic process.
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