Bye-Zoo Thaum tshav kub kub - Kev Tshawb Fawb Kev Tshawb Fawb Txog Kev Ruaj Ntseg Ntawm Lub Hnab Kub Kub Yooj Yim

Daim duab kos duab thiab ib feem ntawm phau ntawv qhia rau "Bye-Bye Heat - Heat Bag" yog raws li nram no:

Duab
I. Lub hauv paus ntsiab lus cua sov ntawm lub hnab cua sov no yog: Nyob rau hauv ib qho kev kub thiab siab, thaum lub concentration ntawm cov kua nyob rau hauv ib tug tov tshaj lub solubility ntawm solute ntawm qhov kub thiab txias, tab sis lub solute tseem tsis precipitate, qhov tshwm sim no hu ua supersaturation. Cov tshuaj nyob rau lub sijhawm no yog hu ua supersaturated tov. Cov tshuaj supersaturated tsis ruaj khov. Yog hais tias cov tshuaj yog vibrated los yog solute crystals ntxiv rau hauv cov tshuaj, cov kua dej ntau dhau hauv cov tshuaj yuav crystallize thiab precipitate, nws thiaj li hloov mus rau hauv lub xeev ruaj khov. Cov lus hauv qab no qhia txog kev solubility ntawm sodium acetate ntawm qhov kub thiab txias. Sodium acetate tov tso cua sov thaum lub sij hawm crystallization.

Duab
II. Txoj kev tshawb nrhiav kev sim yog raws li nram no:

1. Kev suav. Npaj 5 ml ntawm dej distilled ntawm chav tsev kub (kwv yees li 20 degree), ces ntxiv tsis pub tsawg tshaj 2.32 g ntawm sodium acetate. Txhawm rau kom muaj qhov zoo ntawm cov cua sov ua kom sov, txiav txim siab tias 10 g ntawm sodium acetate yuav tsum tau ntxiv.

2. Ntsuas thiab ntsuas. Siv cov khoom siv hluav taws xob thiab lub tog raj kheej kawm tiav los ntsuas qhov xav tau ntawm ob yam khoom.

3. Npaj cov tshuaj Supersaturated. Ncuav ob yam tshuaj rau hauv cov raj sib cais, ua kom sov kom txog thaum cov khoom dissolves tag, thiab tom qab ntawd txias los tsim ib qho kev daws teeb meem.

4. Crystallization thiab ntsuas kub. Ntxiv ib daim hlau rau cov tshuaj supersaturated kom ua rau crystallization, thiab ntsuas qhov kub tam sim ntawd.