Vim li cas ionic compound muaj siab melting thiab boiling point?
Vim li cas ionic compound muaj siab melting thiab boiling point?

Video: Vim li cas ionic compound muaj siab melting thiab boiling point?

Video: Vim li cas ionic compound muaj siab melting thiab boiling point?
Video: Dab neeg keeb kwm Vim li cas Tsov, Hma, Aub thiab miv Siv nplaig yaim dej xwb haus tsis tau dej 2024, Kaum ib hlis
Anonim

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: