Cov pa roj carbon dioxide puas muaj qhov kub thiab txias?
Cov pa roj carbon dioxide puas muaj qhov kub thiab txias?

Video: Cov pa roj carbon dioxide puas muaj qhov kub thiab txias?

Video: Cov pa roj carbon dioxide puas muaj qhov kub thiab txias?
Video: Koj mus ua neej zoo li cas lawm 11/16/2018 2024, Kaum ib hlis
Anonim

-78.46 ° C

Kuj tseem paub yog, cov pa roj carbon dioxide puas muaj qhov kub siab lossis qis qis?

Cov pa roj carbon dioxide yog ib qho yooj yim molecular gas. Nws muaj ib carbon atom covalently bonded rau ob lub atoms oxygen. Txawm li cas los xij, nws muaj qhov boiling tsawg vim hais tias txhua tus molecule yog koom ua ke los ntawm qaug zog intermolecular rog. Cov quab yuam intermolecular no yooj yim tawg.

Kuj Paub, yog vim li cas lub melting thiab boiling point ntawm carbon dioxide yog tib yam? Melting point thiab kub point tsis tas li qhov tseem ceeb thiab nyob ntawm qhov siab ntawm ambient. -78 ° C los yog qhov ntawd yog qhov kub ntawm qhov twg carbon dioxide sublimes (mus los ntawm cov khoom mus rau roj yam tsis tau dhau los ntawm cov kua) ntawm tus qauv atmospheric siab.

Hauv qhov no, vim li cas cov pa roj carbon dioxide muaj qhov kub siab heev?

Cov pa roj carbon dioxide yog ib qho yooj yim molecular khoom, uas txhais tau hais tias cov atoms nyob rau hauv cov khoom yog koom nrog cov muaj zog covalent bonds. Txawm li cas los xij, tsis muaj zog intermolecular rog koom nrog txhua tus neeg molecule ua ke. Cov qaug zog intermolecular no yooj yim tawg. Yog li ntawd carbon dioxide muaj ib qis melting point.

Thaum kub npaum li cas carbon dioxide liquify?

Yog li ntawm qhov siab tshaj 75.1 psi, carbon dioxide yuav ua kua raws li nws sov. Thaum qis qis, dej khov qhuav ua tsis yaj. Ntawm atmospheric siab, 14.7 psi, carbon dioxide sublimes, los yog hloov ncaj qha los ntawm cov khoom mus rau ib tug roj, ntawm -78.5 degrees Celsius.

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