Video: Yuav ua li cas koj xam qhov boiling point elevation?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Qhov yooj yim dua kev sib npaug rau kev txiav txim kub point of a solution: delta T = mKb. Delta T hais txog qhov boil - point elevation , lossis ntau npaum li cas qhov kev daws teeb meem kub point yog tshaj ntawm cov kuab tshuaj ntshiab. Cov units yog degrees Celsius. Kb yog molal boil - point elevation tas li.
Tsis tas li ntawd, dab tsi ua rau qhov kub nce siab?
Boiling point nce yog cov kub hloov (nce) ntawm lub kub point ntawm ib qho hnyav ua rau los ntawm kev ntxiv ib tug solute. Yog tias qhov vapor siab qis dua, cov txheeb ze ntawm cov khoom ua cov pa roj tsawg. Qhov no nce ua kua boil ntawm qhov siab dua kub.
Ib tug kuj yuav nug, qhov twg muaj qhov kub siab tshaj plaws? Ntawm cov muab noble gases xenon muaj qhov kub siab tshaj plaws.
Tom qab ntawd, lo lus nug yog, dab tsi yog qhov kub siab ntawm qhov siab tsis tu ncua?
Lub proportionality tas li , Kb, hu ua molal boil - point elevation tas li . Nws yog ib tas li uas yog sib npaug rau qhov kev hloov hauv lub kub point rau 1-molal tov ntawm ib tug nonvolatile molecular solute. Rau dej , tus nqi ntawm Kb yog 0.512oC / m.
Yam khoom twg muaj qhov kub siab tshaj plaws?
Cov tshuaj lom neeg uas muaj qhov kub siab tshaj plaws yog Helium thiab cov khoom uas muaj qhov kub siab tshaj plaws yog Tungsten.
Pom zoo:
Yuav ua li cas koj xam qhov hnyav thiab qhov sib npaug ntawm lub dav hlau?
Ntxiv tag nrho cov sijhawm mus nrhiav lub sijhawm tag nrho. Faib tag nrho lub sijhawm los ntawm qhov hnyav tag nrho kom pom qhov nruab nrab ntawm lub ntiajteb txawj nqus. Nrhiav tag nrho qhov hnyav thiab qhov nruab nrab ntawm lub ntiajteb txawj nqus ntawm qhov nruab nrab ntawm lub ntiajteb txawj nqus daim ntawv qhia hauv koj lub dav hlau POH los txiav txim seb lub dav hlau puas nyob hauv qhov txwv
Dab tsi yog qhov melting thiab boiling point ntawm sodium?
Lub melting (98 ° C) thiab boiling (883 ° C) cov ntsiab lus ntawm sodium yog qis dua li cov lithium tab sis siab dua li cov hlau alkali hnyav dua poov tshuaj, rubidium, thiab caesium, tom qab lub sij hawm sib txawv ntawm pawg
Vim li cas ionic compound muaj siab melting thiab boiling point?
Ionic tebchaw muaj siab melting thiab boiling cov ntsiab lus vim hais tias muaj ib tug muaj zog electrostatic quab yuam ntawm attraction ntawm lub oppositely them ions thiab li no ib tug loj npaum li cas ntawm lub zog yuav tsum tau mus ua txhaum lub zog sib txuas ntawm ions
Yuav ua li cas koj xam lub sij hawm nws yuav siv sij hawm mus ncig teb chaws?
Kwv yees seb koj yuav mus sai npaum li cas ntawm koj qhov kev mus ncig. Tom qab ntawd, faib koj qhov kev ncua deb ntawm koj qhov nrawm. Qhov no yuav muab rau koj anestimation ntawm koj lub sijhawm mus ncig. Piv txwv li, yog tias koj mus ncig yog 240 mais thiab koj yuav tsav 40 mais ib teev, koj lub sijhawm yuav yog 240/40 = 6hours
Yuav ua li cas koj xam lub sij hawm nws yuav siv ib yam khoom los poob?
Ntsuas qhov deb ntawm qhov khoom yuav poob hauv ko taw nrog tus pas ntsuas lossis ntsuas daim kab xev. Faib qhov kev ncua deb los ntawm 16. Piv txwv li, yog tias cov khoom yuav poob 128 ko taw, faib 128 los ntawm 16 kom tau 8. Xam cov square root ntawm cov kauj ruam 2 los nrhiav lub sij hawm nws yuav siv cov khoom poob hauv vib nas this