Yuav ua li cas hydrogen bonding ntawm cov dej molecules pab piav qhia dej lub peev xwm nqus tau ntau lub zog ua ntej evaporation?
Yuav ua li cas hydrogen bonding ntawm cov dej molecules pab piav qhia dej lub peev xwm nqus tau ntau lub zog ua ntej evaporation?

Video: Yuav ua li cas hydrogen bonding ntawm cov dej molecules pab piav qhia dej lub peev xwm nqus tau ntau lub zog ua ntej evaporation?

Video: Yuav ua li cas hydrogen bonding ntawm cov dej molecules pab piav qhia dej lub peev xwm nqus tau ntau lub zog ua ntej evaporation?
Video: Yuav ncaim lawm es koj xav li cas?. 9/23/2017 2024, Kaum ib hlis
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Cov hydrogen bonds hauv dej tso cai rau nws nqus thiab tso cua sov zog qeeb qeeb tshaj ntau lwm yam khoom. Qhov kub yog qhov ntsuas ntawm qhov kev txav (kinetic zog ) ntawm molecules . Raws li cov lus tsa suab nce, zog yog siab dua thiab yog li kub siab dua.

Ib yam li ntawd, vim li cas hydrogen bonds tsim ntawm cov dej molecules?

Hydrogen - daim ntawv sib txuas hauv kua dej raws li cov hydrogen atoms ib dej molecule yog attracted rau lub oxygen atom ntawm ib tug nyob sib ze dej molecule ; Feem ntau, ib tug proton sib koom los ntawm ob leeg electron khub. Qhov no attraction yog lub hauv paus ntawm lub ' hydrogen ' daim ntawv cog lus.

Tom qab ntawd, lo lus nug yog, nws siv zog npaum li cas los rhuav tshem kev sib txuas ntawm cov dej molecules? Qhov nruab nrab daim ntawv cog lus zog O-H hauv H2O yog 464 kJ / mol. Qhov no yog vim qhov tseeb tias H-OH daim ntawv cog lus yuav tsum tau 498.7 kJ / mol kom dissociate, thaum O-H daim ntawv cog lus xav tau 428 kJ/mol. Thaum twg ntxiv daim ntawv cog lus zog ntawm cov daim ntawv cog lus nyob rau hauv txawv molecules raug muab coj los xav, qhov nruab nrab yuav raug ntau dua.

Cov lus nug tseem yog, vim li cas dej thiaj li muaj txiaj ntsig ntawm hydrogen bonding?

Qhov no attraction tsim los ntawm hydrogen bonding khaws cia dej nyob rau hauv ib tug kua theem nyob rau hauv ib tug ntau yam ntawm kub. Lub zog yuav tsum tau tawg lub hydrogen bonds ua rau dej kom muaj cua sov ntawm vaporization yog li ntawd tias nws yuav siv lub zog loj los hloov ua kua dej nyob rau hauv nws gaseous theem, dej vapor.

Vim li cas hydrogen bonds tseem ceeb hauv dej?

Hydrogen bonds hauv dej muab ntau yam txiaj ntsig zoo rau dej : cohesion (tuav dej molecules ua ke), cov cua kub tshwj xeeb (nqus cua sov thaum tawg, tso cua sov thaum tsim; txo qhov kub hloov pauv), kub kub ntawm vaporization (ntau hydrogen bonds yuav tsum tau tawg thiaj li yuav evaporate dej )

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