Video: Vim li cas ionic compound muaj siab melting thiab boiling point?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ionic tebchaw muaj siab melting thiab boiling point vim muaj yog a muaj zog electrostatic quab yuam ntawm attraction ntawm oppositely them ions thiab li no ib tug loj npaum li cas ntawm lub zog yuav tsum tau los rhuav lub muaj zog bonding quab yuam ntawm ions.
Tib neeg kuj nug, yog vim li cas ions muaj siab melting thiab boiling ntsiab lus?
Hauv ionic tebchaw, muaj ib tug muaj zog quab yuam ntawm attraction ntawm oppositely them ions , yog li ib tug loj npaum li cas ntawm lub zog yuav tsum tau mus ua txhaum lub zog bonding quab yuam ntawm lub ions . Yog vim li cas ionic tshuaj sib xyaw muaj siab melting thiab boiling point.
Qhov thib ob, qhov twg ionic compound muaj ntau dua melting point? Feem ntau, qhov ntau dua tus nqi, qhov loj dua electrostatic attraction, lub zog ntawm ionic daim ntawv cog lus, siab dua qhov melting point. Cov lus hauv qab no piv cov ntsiab lus melting thiab ion nqi rau ob ionic compounds, sodium chloride ( NaCl thiab magnesium oxide (MgO).
Tsis tas li ntawd, cov ionic compounds puas muaj cov ntsiab lus kub kub?
Ionic compounds muaj cov ntsiab lus kub siab dua . Lub zog txaus nyiam ntawm ions muaj zog ntau dua li ntawm covalent molecules. Nws yuav siv li 1000 mus rau 17 000 kJ / mol los cais cov ions hauv ionic compounds.
Covalent compounds puas muaj cov ntsiab lus kub kub?
Covalent bonds nruab nrab ntawm atoms yog muaj zog heev, tab sis attraction ntawm molecules / tshuaj sib xyaw , los yog lub zog intermolecular, ua tau yuav tsis muaj zog. Covalent compounds feem ntau muaj qis boiling thiab melting cov ntsiab lus , thiab yog pom nyob rau hauv tag nrho peb lub cev lub xeev ntawm chav tsev kub.
Pom zoo:
Chlorine melting thiab boiling point yog dab tsi?
Lub npe Chlorine Number of Electrons 17 Melting Point -100.98 ° C Boiling Point -34.6 ° C Ceev 3.214 grams ib cubic centimeter
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
Dab tsi yog hlau tsis muaj melting siab thiab boiling point?
Pob zeb diamond yog ib qho allotrope / daim ntawv ntawm carbon. Yog li, carbon (nyob rau hauv daim ntawv ntawm pob zeb diamond) yog tib yam uas tsis yog-hlau uas muaj heev melting point
Vim li cas lub melting point ntawm pob zeb diamond siab dua graphite?
Nyob rau hauv pob zeb diamond valence electrons yog tag nrho covalently bonded. Tab sis nyob rau hauv graphite tsuas yog peb yog covalently bonded thaum ib tug electron yog dawb do txav.Yog li ntawd nws zoo li hais tias melting point ntawm pob zeb diamond yuav tsum siab tshaj li ntawm graphite vim hais tias nyob rau hauv pob zeb diamond peb yuav tsum tawg plaub covalent bonds thaum nyob rau hauv graphite tsuas yog peb daim ntawv cog lus
Dab tsi yog melting boiling thiab khov point?
Thaum cov khoom hloov mus rau hauv cov kua nws hu ua melting. Lub melting point rau dej yog 0 ° C (32 ° F). Thaum qhov sib txawv tshwm sim thiab cov kua hloov mus rau hauv cov khoom, nws yog hu ua khov. Boiling thiab Condensation. Thaum cov kua ua kua yog hu ua boiling los yog vaporization