Plz explain the highlighted part e whether the process is carried out reversibly or irreversibly, hence 5) au= 4ey-

Further, as the internal cnergy (U) is state function, thie value of AU is same whether the process is carried out reversibly or irreversibly, Hence 5) AU= 4ey-revireyre Combining results (4) and (5), we conclude that Irev irev rey irey Ton 2raya9AM 9revire 0 8) or T T Combining this result with the result given in equatíon (3), we observe that AsystemT uroundings 0 Thus, it may be concluded that in an irreversible process, the entropy change for the combined system and the surroundings is greater than zero, 1e., an irreversible process is accompanied by a net increase of entropy Since all spontancous processes are thermodynamically irreversible (first definition of second law of thermodynamics) it may be stated that Al spontaneous processes are accompanied by a net increase of entropy. This i