Video: Nws txhais li cas yog tias ib yam khoom muaj lub peev xwm kub tshwj xeeb?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Tshwj xeeb kub yog Jg-oK. Yog li ntawd, a siab tus nqi txhais tau tias tias nws yuav siv ntau lub zog los tsa (lossis qis dua) nws qhov kub thiab txias. Ntxiv kub rau ib Tsawg kub tshwj xeeb ” compound yuav ua rau nws qhov kub thiab txias ntau sai dua li ntxiv kub rau a kub tshwj xeeb compound.
Ua raws li qhov no hauv kev txiav txim siab, puas yog cov khoom uas ua kom sov sai sai muaj lub peev xwm siab lossis qis dua?
Tshwj xeeb kub yog tus tus nqi ntawm kub yuav tsum tau tsa tus qhov kub ntawm chav tsev loj ntawm yam khoom mus txog 101^{0} 10. Yog li ntawd, yog tias a tshuaj heats sai sai yuav muaj a Tsawg kub muaj peev xwm.
Ib sab saum toj no, lub peev xwm kub ntawm ib yam khoom lossis cov khoom sawv cev li cas? Tshwj xeeb kub muaj peev xwm yog tus nqi ntawm kub lub zog yuav tsum tau nce qhov kub ntawm a yam khoom nyob rau hauv ib chav tsev loj. Cov tshwj xeeb kub muaj peev xwm ntawm a cov ntaub ntawv yog lub cev khoom. Nws yog kuj yog ib qho piv txwv ntawm cov cuab yeej uas nws kim heev txij li nws tus nqi yog proportional rau qhov loj ntawm qhov system raug tshuaj xyuas.
Kuj paub, dab tsi yog qhov tshwj xeeb kub ntawm cov khoom?
Cov tshwj xeeb kub (tseem hu ua tshwj xeeb kub peev) yog tus nqi ntawm kub yuav tsum tau hloov ib chav tsev loj (los yog chav tsev kom muaj nuj nqis, xws li mole) ntawm a yam khoom los ntawm ib tug degree ntawm kub.
Dab tsi yog qhov sib npaug rau cov peev txheej tshwj xeeb?
Cov units ntawm tshwj xeeb kub muaj peev xwm yog J / (kg ° C) lossis sib npaug J / (kg K). Cov Thaum tshav kub kub muaj peev xwm thiab cov tshwj xeeb kub muaj feem cuam tshuam los ntawm C = cm lossis c = C / m. Mas m, tshwj xeeb kub c, hloov kub ΔT, thiab kub ntxiv (los yog rho tawm) Q muaj feem cuam tshuam los ntawm kev sib npaug : Q=mcΔT.
Pom zoo:
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
Thaum tshav kub kub muaj peev xwm vs tshwj xeeb tshav kub yog dab tsi?
Molar Thaum tshav kub kub muaj peev xwm yog ib qho kev ntsuas ntawm cov cua sov uas tsim nyog los nce qhov kub ntawm ib mole ntawm ib tug ntshiab tshuaj los ntawm ib tug degree K. Tshwj xeeb kub muaj peev xwm yog ib qho kev ntsuas ntawm tus nqi ntawm cov cua sov tsim nyog los nce qhov kub ntawm ib gram ntawm ib tug ntshiab. khoom los ntawm ib degree K
Yam dab tsi ntawm cov dej zoo tshaj plaws piav qhia nws lub peev xwm los yaj ntau yam khoom siv?
Vim tias nws cov polarity thiab muaj peev xwm tsim cov ntawv cog lus hydrogen, dej ua rau cov kuab tshuaj zoo heev, txhais tau tias nws tuaj yeem yaj ntau hom molecules
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