2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
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."
Pom zoo:
Puas yog ntsev thiab kua txob lossis kua txob thiab ntsev?
Ntshav thiab kua txob yog lub npe siv tau rau ntsev thiab kua txob dub, uas yog ib txwm ua khub ntawm cov rooj noj mov sab hnub poob kom tso cai rau cov khoom noj ntxiv tom qab nws npaj.. Thaum lub sij hawm npaj zaub mov los yog ua noj, lawv kuj tseem yuav muab ntxiv ua ke.
Puas yog hydrogenated fats khoom los yog kua?
Trans rog yog semi-khoom nyob rau hauv chav tsev kubtshuav qhov chaw ntawm ib qho (lossis ntau dua) ntawm nws cov tshuaj tiv thaiv nyob rau hauv "trans-" es tsis yog "cis- “txoj haujlwm. Muaj ob hom trans rog: ntuj thiab dag. Artificial trans fats pib ua cov roj zaub, uas yog kua ntawm chav tsev kub.
Puas yog cov kua dej nres lub hwj chim tswj cov kua dej?
Cov kua nplaum thiab lub hwj chim tswj cov kua dej yogob lub kua siv hauv lub tshuab hydraulic hauv cov tsheb niaj hnub, tab sis qhov zoo sib xws tsis mus deb tshaj qhov ntawd. Nres thiab lub hwj chim tswj cov kua dej tau tsim thiab ua kom zoo nyob rau ntau xyoo los ua haujlwm sib txawv hauv cov tsheb, thiab lawv tsis hloov pauv.
Puas yog cov roj cholesterol ua kom cov kua dej ua kua dej?
Thaum qhov kub thiab txias, cov roj cholesterol ua rau cov kua dej ua kom cov kua dej ntau dualos ntawm kev tiv thaiv cov lipids los ntawm kev ntim khoom sib ze. Thaum qhov kub thiab txias, cov roj (cholesterol) yuav txo qis hauv daim nyias nyias.
Cov khoom siv puas yog khoom vaj khoom tsev?
khoom yog a khoom vaj khoom tsev ruaj khov, lossis khoom tsis yog tam sim no. Qhov no txhais tau tias nws yuav tsis raug muag hauv lub xyoo tom ntej accounting thiab tsis tuaj yeem ua kua tau yooj yim. Txawm hais tias nws yog qhov zoo kom muaj cov khoom muaj nqis tam sim no uas muab koj lub lag luam npaj nkag mus rau cov nyiaj ntsuab, tau txais cov cuab tam mus sij hawm ntev kuj yog qhov zoo.
