Video: Vim li cas lub zog muaj peev xwm nce thaum melting?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Thaum twg dej khov los yog lwm yam khoom yaj , nws muaj peev xwm zog nce . Los ntawm thermal kinetic zog , los yog kub, ua tsis yog nce thaum melting . Lub zog muaj peev xwm yog latent zog uas tuaj yeem tso los ntawm dej, thiab qhov no nce vim dej yuav tso cua sov zog yog tias nws khov dua.
Yog li ntawd, vim li cas lub zog muaj peev xwm nce thaum lub sij hawm hloov pauv?
Cov zog uas yog hloov thaum lub sij hawm hloov yog muaj peev xwm zog . Thaum lub sijhawm hloov pauv , cua sov ntxiv (PE nce ) los yog tso tawm (PE txo) yuav tso cai rau cov molecules txav sib nrug los yog tuaj ua ke. Thaum tshav kub kub absorbed ua rau cov molecules txav mus deb sib nrug los ntawm overcoming lub intermolecular rog ntawm attraction.
Tsis tas li ntawd, yuav ua li cas rau lub zog muaj zog thaum kub nce? Yog lawm, muaj peev xwm zog nce nrog nce kub rau yam tsawg kawg yog peb yam nram qab no: Thaum siab dua kub , ntau atoms / molecules nyob rau hauv cov hluav taws xob zoo siab. Cov xeev hluav taws xob siab dua sib raug rau ntau dua muaj peev xwm zog . Muaj Peev Xwm Zog yog -2 npaug Kinetic Zog.
Ntawm no, puas muaj peev xwm nce ntxiv thaum dej khov yaj?
Thaum twg dej khov los yog lwm yam khoom yaj , nws muaj peev xwm zog nce . Tseeb tiag, qhov no yog tib qho nce hauv zog , los ntawm thermal kinetic zog , los yog kub, ua tsis yog nce thaum yaj . Ntawm txhua theem hloov dej, seb dej khov mus ua kua dej los yog kua dej mus rau dej vapor, lub muaj peev xwm zog txo.
Vim li cas lub zog muaj peev xwm nce?
Qhov system muaj peev xwm zog yog nce los ntawm kev nce qhov siab. Tom qab ntawd, lub ntiajteb txawj nqus yuav dhau mus, ua rau feem ntau ntawm cov muaj peev xwm zog hloov mus rau kinetic zog . Ib qho ntawm cov khoom seem zog uas tsis tau hloov dua siab tshiab rau hauv kinetic zog los ntawm qhov kawg ntawm kev caij yog zog poob vim kev sib txhuam.
Pom zoo:
Vim li cas lub zog gravitational muaj peev xwm nce nrog qhov siab?
Qhov siab dua ib yam khoom yog qhov ntau dua nws lub zog gravitational. Raws li feem ntau ntawm GPE no tau hloov mus rau hauv lub zog kinetic, qhov siab dua ntawm cov khoom pib los ntawm qhov nrawm dua nws yuav poob thaum nws tsoo hauv av. Yog li qhov kev hloov pauv ntawm lub zog gravitational nyob ntawm qhov siab ntawm qhov khoom txav mus los
Puas yog lub zog gravitational zoo ib yam li lub zog muaj peev xwm?
Lub zog muaj peev xwm yog lub zog uas khaws cia rau hauv ib yam khoom lossis khoom siv. Gravitational muaj peev xwm zog yog lub zog nyob rau hauv ib yam khoom uas yog tuav nyob rau hauv ib tug ntsug txoj hauj lwm. Elastic muaj peev xwm lub zog yog lub zog khaws cia hauv cov khoom uas tuaj yeem ncab lossis compressed
Dab tsi yog qhov txawv ntawm electrostatic muaj peev xwm thiab electrostatic muaj peev xwm zog?
Tsis muaj qhov sib txawv ntawm electrostatic potentialenergy thiab hluav taws xob (al) muaj peev xwm zog. Lub peev xwm hluav taws xob ntawm ib qho taw tes yog kev ua haujlwm los ntawm lwm qhov kev quab yuam hauv kev txav chav tsev zoo los ntawm ib qho arbitrarilychosen xoom ntawm lub peev xwm (feem ntau infinity) mus rau lub ntsiab lus
Puas muaj peev xwm hluav taws xob thiab lub zog muaj peev xwm tib yam Vim li cas lossis vim li cas ho tsis?
Lub zog muaj peev xwm hluav taws xob Ue yog lub zog muaj peev xwm khaws cia thaum cov nqi tawm ntawm qhov sib npaug (xws li lub zog muaj peev xwm gravitational). Lub peev xwm hluav taws xob zoo ib yam, tab sis ib tus nqi, Ueq. Ib qho hluav taws xob muaj peev xwm sib txawv ntawm ob lub ntsiab lus hu ua voltage, V = Ue2q−Ue1q
Puas muaj peev xwm equilibrium zoo ib yam li so muaj peev xwm?
Qhov sib txawv ntawm daim nyias nyias muaj peev xwm thiab qhov muaj peev xwm sib npaug (-142 mV) sawv cev rau lub zog hluav taws xob hluav taws xob uas tsav Na + mus rau hauv lub xovtooj ntawm lub peev xwm so membrane. Thaum so, txawm li cas los xij, qhov permeability ntawm daim nyias nyias mus rau Na + tsawg heev kom tsuas yog me me Na + xau rau hauv lub cell