2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Vim kev tawg ntawm thaj chaw ntawm cov molecules txo qis uas ua rau nws sib zog dua, nws yuav yooj yim dua ntim lawv kom nruj thiab nws yuav nyuaj rau tawg cov qauv compact li no piav qhia tias vim yog branching melting point nce.
Yuav ua li cas nce melting point?
Lub zog muaj zog ntau dua yog, lub zog ntau dua, yog li qhov siab dua qhov melting yog. Ntau lub zog intermolecular nyob ntawm seb muaj zog atoms hauv cov molecule nyiam electrons - lossis lawv cov electronegativity.
Puas muaj ceg ntau ntxiv ua rau kub hnyiab?
Branching txo qhov kub hnyiab Yog li qhov nce ntawm thaj chaw saum npoo yuav ua rau muaj peev xwm ntawm cov molecules rau ib leeg. Branching nyob rau hauv molecules txo qhov chaw saum npoo yog li txo lub zog txaus nyiam ntawm ib tus neeg molecules. Raws li qhov tshwm sim, qhov kub kub txo qis.
Puas cov ceg ntoo alkanes puas muaj cov ntsiab lus melting ntau dua?
Txawm tias muaj tus lej sib npaug ntawm C atoms, isomeric branched alkanes pom cov ntsiab lus sib txawv. Raws li txoj cai ntawm tus ntiv tes xoo, ntau asymmetric lub molecule qis dua qhov melting point. Lub luag haujlwm rau tus cwj pwm no yog qhov txo qis ntawm van der Waals rog ntawm cov molecules nrog nce branching.
Yuav ua li cas rau qhov kub hnyiab thaum ceg nce?
cov ntsiab lus kub nce raws li cov pa roj carbon ntau ntxiv. Branching txo qhov kub hnyiab.
Pom zoo:
Puas yog lub melting point ntawm titanium?
Titanium yog cov khoom siv tshuaj nrog lub cim Ti thiab tus lej atomic 22. Nws qhov hnyav atomic yog 47.867 ntsuas hauv d altons. Nws yog ib qho kev hloov pauv hlau nrog cov xim nyiaj, tsis tshua muaj siab, thiab lub zog siab, tiv taus corrosion hauv dej hiav txwv, aqua regia, thiab chlorine.
Puas yog tsob ntoo ntoo zoo ntoo?
Walnut firewood yog taws tswm ciab zoo nrog nruab nrab ntomthiab yog qhov yooj yim rau hlawv. Nws yog cov ntoo zoo uas kub hnyiab tau, yooj yim los pib, thiab muaj cov ntxhiab tsw qab ntxiag. Tus nqi BTU tsis siab npaum li lwm cov ntoo tawv, xws li ntoo qhib, tab sis zoo dua li ntoo ntoo, xws li ntoo thuv lossis fir.
Puas yog ionic compounds uas tsis muaj melting point?
Ntawm qhov tod tes, cov atoms (ions) hauv cov ntaub ntawv ionic qhia muaj zog rau lwm cov ions hauv lawv thaj tsam. Qhov no feem ntau ua rau cov ntsiab lus melting qis rau covalent solids, thiab cov ntsiab lus melting siab rau ionic solids. Puas ionic compounds muaj qis lossis siab melting point?
Dab tsi yog qhov melting point ntawm arsenic?
Arsenic yog cov khoom siv tshuaj nrog lub cim As thiab tus lej atomic 33. Arsenic tshwm sim hauv ntau cov zaub mov, feem ntau yog ua ke nrog sulfur thiab hlau, tab sis kuj yog ib qho ntshiab elemental siv lead ua. Arsenic yog metalloid. Vim li cas arsenic boiling point thiab melting point?
Hydrogens melting point yog dab tsi?
Hydrogen yog cov khoom siv tshuaj nrog lub cim H thiab tus lej atomic 1. Hydrogen yog lub teeb tshaj plaws. Ntawm cov txheej txheem hydrogen yog cov pa roj ntawm diatomic molecules muaj cov qauv Hâ‚‚. Nws yog xim tsis muaj ntxhiab, tsis muaj ntxhiab, tsis muaj tshuaj lom, thiab kub kub heev.
