Video: Vim li cas dej thiaj li muaj qhov melting siab?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Yog vim li cas siab melting thiab kub kub yog qhov sib txuas ntawm hydrogen dej molecules uas ua rau lawv lo ua ke thiab tiv thaiv raug rub tawm uas yog tshwm sim thaum dej khov yaj thiab dej boils los ua ib tug gas.
Ua li no, yog vim li cas dej thiaj li melting point tsawg?
Dej cov molecules txuas rau ib leeg los ntawm hydrogen bonds uas yog me ntsis zog dua van dar Waals quab yuam; yog li ntawd, nws yog kua ntawm chav tsev kub. Tseem nws yuav tsum tau heev qis lub zog tshem tawm H-bond zog piv nrog cov ionic bonds. Yog li ntawd, nws melting point yog piv qis.
Tom qab ntawd, lo lus nug yog, yog vim li cas lub boiling point ntawm dej siab tshaj nws melting point? Cov khoom siv tshuaj lom neeg ntawm dej (feem ntau nws yog siab polarity thiab hydrogen bonding) xyuas kom meej tias nws yuav siv sij hawm ntau yog tias lub zog hloov pauv nws xeev. Cov kub point yog siab dua vim gases yeej ib txwm sov tshaj ib yam khoom ntawm tib yam khoom.
Nyob rau hauv tas li ntawd, dej puas muaj ib tug siab melting point?
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Dab tsi yog qhov muaj zog ntawm lub zog sib xyaw ua ke hauv dej?
Lub zog muaj zog tshaj plaws nyob rau hauv dej yog ib daim ntawv cog lus tshwj xeeb dipole hu ua hydrogen daim ntawv cog lus . Ntau cov molecules yog polar thiab tuaj yeem tsim cov ntawv cog lus bipole-bipole yam tsis muaj kev sib sau hydrogen bonds los yog muaj hydrogen nyob rau hauv lawv cov molecule.
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