Zaj. Peb lub xeev ntawm cov teeb meem muaj - khoom, kua, thiab roj. Solids muaj cov duab meej thiab ntim. Cov kua dej muaj qhov ntim meej, tab sis coj cov duab ntawm lub thawv.
Puas yog kua yog kua lossis roj?
Liquid yog ib qho ntawm plaub lub xeev tseem ceeb ntawm cov teeb meem, nrog rau lwm tus yog cov khoom, roj thiab ntshav. Cov kua yog kua. Tsis zoo li cov khoom, cov molecules hauv cov kua muaj kev ywj pheej ntau dua rau kev txav mus los.
Cov khoom thiab cov kua hu ua dab tsi?
Ib theem hloov pauv yog qhov hloov pauv hauv cov xwm txheej. Piv txwv li, ib qho khoom yuav dhau los ua kua. Qhov kev hloov pauv no yog hu ua melting. … Cov kev hloov theem feem ntau yog tshwm sim los ntawm kev hloov ntawm qhov kub thiab txias. Raws li cov xeev ntawm cov teeb meem hloov ntawm cov khoom mus rau cov kua mus rau cov roj, feem, lawv muaj pes tsawg leeg hloov ib yam.
Yuav ua li cas thaum cov kua hloov mus ua khov?
Freezing tshwm sim thaum cov kua txias thiab tig mus rau ib qho khoom. Nws thiaj li cov hais nyob rau hauv cov kua nres txav mus thiab nyob rau hauv ib tug ruaj khov kho, tsim ib tug khoom. Qhov no yog hu ua khov thiab tshwm sim ntawm qhov kub thiab txias li melting.
Cov piv txwv ntawm cov kua ua kua yog dab tsi?
Piv txwv ntawm Kev Hloov Ua Kua rau Cov Sij Hawm Hloov Kho (kho)
- Dej rau dej khov - Dej txias txaus kom nws hloov mus ua dej khov. …
- Kua rau cov muaju - Cov kua dej feem ntau khov los ntawm cov txheej txheem hu ua "crystallization," uas cov kua ua rau hauvdab tsi paub hauv ntiaj teb kev tshawb fawb raws li "crystalline solid."
