Cov tshuaj uas muaj qhov kub siab tshaj plaws yog Helium thiab cov khoom uas muaj qhov kub siab tshaj plaws yog Tungsten. Kev sib koom ua ke siv rau qhov melting point yog Celsius (C). Nyem qhov no: hloov Celsius rau Fahrenheit lossis Kelvin.
Qhov twg yuav muaj qhov kub siab tshaj plaws?
Ib tug uas tsis muaj zog tshaj IMF yuav muaj qhov kub siab tshaj plaws. CH4 tsuas muaj kev tawg rog thaum tag nrho lwm tus muaj kev sib cais PLUS yog dipole-dipole (HCl, H2S, NH3), thiab / lossis hydrogen bonding (NH3). Yog li, CH4 yuav muaj qhov kub siab tshaj plaws.
Qhov twg muaj qhov kub siab tshaj plaws Vim li cas?
Lub caij uas muaj qhov kub siab tshaj plaws yog helium. Ob lub ntsiab lus kub ntawm rhenium thiab tungsten tshaj 5000 K ntawm tus qauv siab; vim tias nws nyuaj rau ntsuas qhov kub thiab txias heev yam tsis muaj kev tsis ncaj ncees, ob qho tib si tau hais hauv cov ntaub ntawv uas muaj qhov kub siab dua.
Yuav ua li cas rau qhov kub hnyiab?
Qhov nce hauv qhov kub (thiab qhov melting point) tuaj yeem raug ntaus nqi rau qhov nce hauv cov rog sib txawv (van der Waals). Tus naj npawb ntawm cov hluav taws xob nce hauv txhua lub ntsiab lus mus rau hauv pawg, qhov no ua rau muaj kev nce hauv ib ntus dipoles uas tuaj yeem teeb tsa.
Dab tsi muaj qhov kub siab tshaj plaws?
Carbon muaj qhov kub siab tshaj plaws ntawm 3823 K (3550 C) thiab Rhenium muaj qhov kub siab tshaj plaws ntawm 5870 K (5594 C).
