Dab tsi ua rau lub compound muaj qhov kub siab dua?
Dab tsi ua rau lub compound muaj qhov kub siab dua?

Video: Dab tsi ua rau lub compound muaj qhov kub siab dua?

Video: Dab tsi ua rau lub compound muaj qhov kub siab dua?
Video: Tuag Ua Dab Tsi💘by TXOS LAUJ / Nkauj Tawm Tshiab 2021 Official 2024, Kaum ib hlis
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Loj molecules muaj ntau electrons thiab nuclei uas tsim van der Waals txaus nyiam zog, yog li lawv tshuaj sib xyaw feem ntau muaj cov ntsiab lus kub siab dua tshaj qhov zoo sib xws tshuaj sib xyaw ua los ntawm me me molecules. Nws yog ib qho tseem ceeb heev los siv txoj cai no tsuas yog nyiam tshuaj sib xyaw.

Ntxiv rau qhov no, dab tsi txiav txim siab qhov kub ntawm cov khoom?

Cov boiling point ntawm ib yam khoom yog cov kub Thaum lub vapor siab ntawm cov kua sib npaug ntawm lub siab nyob ib puag ncig cov kua thiab cov kua hloov mus rau hauv vapor. Cov kua hauv ib nrab lub tshuab nqus tsev muaj qhov qis dua kub point tshaj li thaum cov kua nyob rau ntawm atmospheric siab.

Tsis tas li ntawd, qhov twg muaj qhov kub siab tshaj plaws? Ntawm cov muab noble gases Xenon muaj qhov kub siab tshaj plaws.

Cov lus nug tseem yog, vim li cas cov molecules loj dua muaj cov ntsiab lus kub dua?

Tag nrho cov atoms thiab molecules muaj ib tug tsis muaj zog attraction rau ib leeg, hu ua van der Waals attraction. Feem ntau, cov molecules loj dua muaj cov ntsiab lus kub dua tsawg dua molecules ntawm tib yam, qhia tias dispersion rog nce nrog huab hwm coj, tus naj npawb ntawm electrons, tus naj npawb ntawm atoms lossis qee qhov sib xyaw ua ke.

Dab tsi yog qhov kub siab tshaj plaws?

Cov pa roj carbon muaj siab tshaj melting point ntawm 3823 K (3550 C) thiab Rhenium muaj cov qhov kub siab tshaj plaws ntawm 5870 K (5594 C). Raws li google, Tungsten boils ntawm 5555 C, tab sis rhenium yog 39 C siab dua ntawm 5594 C.

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