Chapter24Entropyandthesecondlawofthermodynamics24-1Twokindsofprocessesandentropy1.Irreversibleprocesses（不可逆过程）(a)“Allnaturallyoccuringprocessesproceedinonedirectiononly.Theynever,oftheirownaccord,proceedintheoppositedirection.”Suchspontaneousone-wayprocessesare“irreversible”.(b)Althoughthe“wrong-way”eventsdonotoccur,noneofthemwouldviolatethelawofconservationofenergy.See动画库\力学夹\5-08过程的方向性2.Reversibleprocess（可逆过程）Inreversibleprocess,wemakeasmallchangeinasystemanditsenvironment;byreversingthatchange,thesystemandenvironmentwillreturntotheiroriginalconditions.Inatrulyreversibleprocess,therewouldbenofriction,turbulence(紊乱),oroth...
