Izibonelo Zokusetshenziswa Kwemithetho Ye-Thermodynamics
Imithetho ye-thermodynamics iyiqoqo lezimiso eziyisisekelo ezichaza indlela ukudluliselwa kwamandla kanye noshintsho okwakheka ngayo, ikakhulukazi njengoba kuhlobene nokushisa, umsebenzi, kanye nezakhiwo zezinto. Nakuba kungase kuzwakale kuyimfundiso, imithetho ye-thermodynamics ihlobene kakhulu nokuphila kwansuku zonke: kusukela endleleni isiqandisi esipholisa ngayo ukudla, kuya endleleni injini yemoto eguqula ngayo uphethiloli ube ukunyakaza, kuya endleleni umzimba womuntu ogcina ngayo izinga lokushisa lawo. Lesi sihloko sihlola izibonelo zemithetho ye-thermodynamics—kusukela kuMthetho we-Zeroth kuya kuMthetho Wesithathu—ezimweni zolimi ezilula ukuziqonda kanye nezimo zangempela.
1. Umthetho we-Zeroth we-Thermodynamics: Imiqondo Eyisisekelo Yokushisa Nokulingana Kokushisa
Umthetho we-Zeroth we-Thermodynamics uthi: uma uhlelo A lusekulinganisweni kokushisa nohlelo B, kanti uhlelo B lusekulinganisweni kokushisa nohlelo C, khona-ke uhlelo A nalo lusekulinganisweni kokushisa nohlelo C. Ingqikithi ingumqondo wokulingana kokushisa kanye nencazelo yokushisa.
Isibonelo sesicelo:
1. I-Thermometer yokukala izinga lokushisa lomzimba
Uma kufakwa i-thermometer emzimbeni, ukushintshaniswa kokushisa kwenzeka kuze kube yilapho i-thermometer nomzimba kufinyelela ekubalweni kokushisa. Uma lokhu kulingana sekufinyelelwe, izinga lokushisa le-thermometer libhekwa njengelifana nezinga lokushisa lomzimba, okwenza ukulinganisa kube semthethweni. Ngaphandle koMthetho we-Zeroth, umqondo "wokulinganisa izinga lokushisa" ubungeke ube nasisekelo.
2. Ukulinganisa amathuluzi okulinganisa izinga lokushisa embonini
Ekukhiqizeni ukudla, imithi, noma ilabhorethri, izinzwa zokushisa kumele zilinganiswe kusetshenziswa ireferensi ejwayelekile (isb., ukugeza ngamanzi ekushiseni okuthile). Inzwa kanye nereferensi kuvunyelwe ukufinyelela ukulingana kokushisa ukuze ukufundwa kubhekwe njengokunembile. Lokhu kuncike ngqo kuMthetho kaZeroth.
2. Umthetho Wokuqala We-Thermodynamics: Ukulondolozwa Kwamandla Nokuguqulwa Kokushisa-Umsebenzi
Umthetho Wokuqala We-Thermodynamics uwuhlobo olukhethekile lomthetho wokulondolozwa kwamandla. Ngokomqondo, ushintsho lwamandla ohlelweni lulingana nokufakwa kokushisa ohlelweni ngaphandle komsebenzi owenziwe uhlelo endaweni ezungezile. Amandla awakwazi ukudalwa noma ukubhujiswa—angashintsha isimo kuphela.
Isibonelo sesicelo:
1. Izinjini zokushisa zangaphakathi (izimoto nezithuthuthu)
Uphethiloli uqukethe amandla amakhemikhali. Uma ushiswa, la mandla aguqulwa abe amandla okushisa, abese eguqulwa abe umsebenzi womshini wokuhambisa ama-piston, i-crankshaft, futhi ekugcineni amasondo. Akuwona wonke la mandla aba ukunyakaza; iningi lawo lilahleka njengokushisa nge-exhaust kanye ne-radiator. UMthetho Wokuqala uchaza ukuthi amandla aya kuphi lapho imoto ihamba.
2. Isikhungo sikagesi esinomusi (i-PLTU)
Amalahle (noma omunye umthombo wokushisa) afudumeza amanzi ukuze akhe umusi ocindezela kakhulu. Umusi uphendula i-turbine (uyasebenza), wona ophendula ijeneretha, ukhiqiza ugesi. Lolu chungechunge lokuguqulwa kwamandla luthobela uMthetho Wokuqala: amandla okushisa angenayo ahlukaniswe amandla kagesi awusizo kanye namandla okushisa alahlekelwa yimvelo.
3. Iphampu yebhayisikili kanye nokushisa okucindezelwayo
Uma ithayi lifuthwe umoya, umoya uyacindezelwa, okwandisa izinga lokushisa kwalo. Amandla okusebenza avela esandleni (ngephampu) adluliselwa kugesi njengamandla angaphakathi, okwenza igesi (kanye nephampu) kuzizwe kufudumele. Lesi simo esilula siyisibonelo esicacile sobudlelwano phakathi komsebenzi kanye noshintsho lwamandla angaphakathi.
4. Bilisa amanzi ekhishini
Uma isitofu sishisa ipani, ukushisa kudluliselwa kusuka elangabini kuya epanini namanzi. Amandla angaphakathi amanzi ayanda, okwenza izinga lokushisa lawo likhuphuke, bese kuba noshintsho lwesigaba oluya kumusi. UMthetho Wokuqala usiza ukuchaza ukuthi amandla avela emthonjeni wokushisa awalahleki kodwa kunalokho agcinwa njengamandla angaphakathi noma asetshenziselwa ushintsho esimweni.
3. Umthetho Wesibili We-Thermodynamics: Isiqondiso Senqubo, I-Entropy, kanye Nokusebenza Kahle
UMthetho Wesibili We-Thermodynamics uchaza ukuthi izinqubo zemvelo zinesiqondiso. Ukushisa kugeleza ngokuzenzakalelayo kusuka ezintweni ezinokushisa okuphezulu kuya ezintweni ezinokushisa okuphansi, hhayi okuphambene nalokho. Lo mthetho uphinde wethule umqondo we-entropy, ongaqondwa kalula njengesilinganiso "se-disorder," noma inani lezindlela amandla ahlelwe ngazo ngaphakathi kwesistimu. UMthetho Wesibili uthi i-entropy iyonke (isistimu + indawo ezungezile) ivame ukwanda.
Isibonelo sesicelo:
1. Amafriji nama-air conditioner: hambisa ukushisa "ngokuphambene nesiqondiso semvelo"
Ukushisa kugeleza ngokwemvelo kusuka esifudumezini sangaphandle kuya esipholileni ngaphakathi kwesiqandisi. Kodwa-ke, isiqandisi sidlulisela ukushisa kusuka ekamelweni elibandayo kuya endaweni efudumele sisebenzisa amandla kagesi. Ngenxa yokuthi siphoqa ukushisa ukuthi kugeleze ngokumelene nokugeleza kwemvelo, isiqandisi sidinga amandla engeziwe. Yingakho isiqandisi singeke sisebenze ngaphandle kwamandla kagesi futhi singakwazi ukufeza ukusebenza kahle okungu-100%.
2. Kungani imishini ingasebenzi kahle ngokuphelele?
Izinjini zokushisa zihlala zenqaba ukushisa okuthile endaweni ezungezile. Ngisho nezinjini ezinhle kakhulu kumele zibe "nesinki sokushisa" ukuze umjikelezo we-thermodynamic uqhubeke. UMthetho Wesibili uchaza imikhawulo yemfundiso yokusebenza kahle kwenjini, isibonelo ngomqondo wokusebenza kahle kweCarnot, okuncike emazingeni okushisa emithombo eshisayo nebandayo. Uchaza nokuthi kungani izimoto zihlala zikhiqiza ukushisa okweqile nokuthi kungani izitshalo zamandla zidinga imibhoshongo yokupholisa noma izinhlelo ze-condenser.
3. Iqhwa liyancibilika ekushiseni kwegumbi
Iqhwa etafuleni lizoncibilika njengoba limunca ukushisa okuvela endaweni efudumele. Le nqubo yandisa i-entropy iyonke ngoba amandla asatshalaliswa ngokulinganayo. Okuphambene nalokho—amanzi ekushiseni kwegumbi aqandisa ngokuzumayo ngaphandle kokukhulula ukushisa endaweni ezungezile—akwenzeki ngokuzenzakalelayo ngoba kuzonciphisa i-entropy iyonke.
4. Ukuxuba izinto kanye nokusabalala kwazo
Iphunga lephunga lisakazeka kulo lonke igumbi ngaphandle kwesidingo somoya. Izinhlayiya zihamba ngokungahleliwe futhi zivame ukusabalala kusuka ezindaweni ezinamazinga aphezulu kuya kwaphansi. Lokhu kuhambisana nokuthambekela kwesistimu esimweni esilinganayo (i-entropy ephezulu).
4. Umthetho Wesithathu We-Thermodynamics: Umkhawulo Wezinga Lokushisa Eliphansi kanye Nokungenzeki Kokufinyelela Ku-Absolute Zero
UMthetho Wesithathu We-Thermodynamics uthi njengoba izinga lokushisa lisondela ku-absolute zero (0 Kelvin), i-entropy yekristalu ephelele isondela enanini elincane (isondela ku-zero). Empeleni, lo mthetho uthi i-absolute zero ayinakufinyelelwa ngenani elilinganiselwe lezinyathelo.
Isibonelo sesicelo:
1. Ubuchwepheshe be-Cryogenic
Ukukhiqizwa nokugcinwa kwe-nitrogen ewuketshezi (77 K) noma i-helium ewuketshezi (cishe i-4 K) kudinga amasu okupholisa kancane kancane kanye nokusetshenziswa kwamandla amakhulu. UMthetho Wesithathu uchaza ukuthi kungani uma kusondela ku-0 K, kuba nzima kakhulu ukwehlisa izinga lokushisa: kudinga umzamo omkhulu "wokukhipha" amandla okushisa asele ohlelweni.
2. Ucwaningo lwe-Superconductors kanye nezinto zokwakha
Ezinye izinto ziba ama-superconductor emazingeni okushisa aphansi kakhulu (okusondela ekumelaneni kukagesi okungelutho). Ama-laboratories asebenzisa izimiso ze-cryogenic ukuze afinyelele amazinga okushisa aphezulu kakhulu, kodwa awafinyeleli ngempela ku-0 K. Umthetho Wesithathu wakha isisekelo somkhawulo oyisisekelo wokupholisa futhi uchaza ukuziphatha kokushisa kwezinto emazingeni okushisa aphansi.
3. Izinzwa zokushisa okuphansi kanye nezinsimbi
Ezindaweni zokuhlola izinkanyezi, izinzwa ze-infrared zivame ukupholiswa ukuze kuncishiswe umsindo wokushisa. Uma izinga lokushisa liphansi, umsindo wokushisa uphansi, kodwa kunemikhawulo esebenzayo neyomqondo ehambisana noMthetho Wesithathu.
5. Imithetho yeThermodynamics Empilweni Yansuku Zonke: Ukubuka Konke Okuphelele
Uma kuhlanganiswa, imithetho emine ye-thermodynamics yakha uhlaka lwendlela esiqonda ngayo amandla:
– Umthetho we-Zeroth uvumela ukulinganiswa kwezinga lokushisa nokuqonda lapho izinto ezimbili “zilinganiswe ngokushisa”.
– UMthetho Wokuqala uqinisekisa ukuthi singakwazi ukubala nokulandelela izinguquko zamandla ohlelweni—akukho mandla alahlekayo ngaphandle kokulandela umkhondo.
– UMthetho Wesibili usitshela indlela yenqubo futhi uchaza ukuthi kungani “sihlala sikhokhela” amandla uma sifuna ukudlulisa ukushisa noma ukuguqula amandla abe umsebenzi njalo.
– UMthetho Wesithathu ubeka umkhawulo ekupholiseni futhi uchaza ukuziphatha kwezinto njengoba zisondela emazingeni okushisa aphansi kakhulu.
Izibonelo ezifana neziqandisi, izinjini zezimoto, izitshalo zamandla, ukucindezelwa kwegesi, ukuncibilika kweqhwa, ngisho nobuchwepheshe be-cryogenic zibonisa ukuthi i-thermodynamics ingaphezu nje kwefomula encwadini. Yisimiso esilawula amadivayisi ezobuchwepheshe besimanje kanye nezinqubo zemvelo ezisizungezile. Ukuqonda ukusetshenziswa kwayo kusisiza ukuhlola ukusebenza kahle kwamandla, ukuklama amadivayisi asebenza kahle kakhulu, futhi siqonde ukuthi kungani ezinye izinto “zingenakwenzeka”—isibonelo, injini esebenza kahle ngo-100% noma ukupholisa kuze kube yi-zero ngokuphelele. Ngakho-ke, imithetho ye-thermodynamics iphakathi kwezisekelo eziwusizo nezifanele kakhulu ze-physics empilweni yethu.
