Irreversible Changes an irreversible change is one that is not reversible · In an irreversible as expansion, Pex p gas In an irreversible compression, Pex >p gas
Irreversible Changes • An irreversible change is one that is not reversible. • In an irreversible expansion, pex < pgas • In an irreversible compression, pex > pgas pex pgas pex pgas
Indicator Diagram: compression T=273K additional irreversible reversible work 5 15 20
Indicator Diagram: compression 0 2 4 6 8 1 0 0 5 1 0 1 5 2 0 pex V Vi f T = 273 K additional irreversible work reversible work