Video: Puas yog dissolution ntawm borax spontaneous?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Teb thiab piav qhia: Lub dissolution ntawm borax Nyob rau hauv dej yog ib qho endothermic cov tshuaj tiv thaiv yog li nws yog qhov kub-nyob ntawm cov tshuaj tiv thaiv. Cov tshuaj tiv thaiv tsis yog- tus kheej raws li cov cua sov yuav tsum tau raws li ib tug reactant rau borax rau yaj hauv dej. Yog li ntawd, solubility ntawm borax yog kub nyob ntawm.
Ua kom pom qhov no, puas yog qhov kev sib cais ntawm borax endothermic lossis exothermic?
Cov kev tawg (enthalpy lossis cua sov ntawm kev daws) rau borax (sodium tetraborate) yog ib qho endothermic txheej txheem.
Kuj Paub, vim li cas borax yaj hauv dej? Kub dej tuav ntau dua borax crystal dua txias dej . Qhov ntawd yog vim cua sov dej molecules txav deb deb, ua chaw rau ntau dua borax siv lead ua rau yaj . Thaum tsis muaj kev daws teeb meem ntxiv yaj , koj tau mus txog saturation. Raws li qhov kev daws teeb meem no txias, lub dej molecules txav los ze dua ua ke dua.
Ua raws li qhov xav tau, KSP ntawm borax yog dab tsi?
Qhov sib npaug tas li rau qhov kev sib cais ntawm Nplooj 2 Enthalpy thiab Entropy ntawm ib Borax Kev daws teeb meem 4/28/15 2 cov khoom nyob rau hauv cov kuab tshuaj hu ua "solubility product constant" ( Ksp ).
Puas yog qhov solubility ntawm borax nce los yog txo nrog nce kub?
- Cov solubility ntawm borax hauv dej nce raws li kub nce . - Ntau borax yog yaj ntawm siab dua kub , qhia tias cua sov yog ib qho reactant.
Pom zoo:
Yuav ua li cas koj paub yog hais tias ib tug txheej txheem yog spontaneous?
Los ntawm kev xav txog ob yam no, peb tuaj nrog Gibbs Free Energy sib npaug los kwv yees seb qhov kev cuam tshuam yuav tshwm sim li cas lossis tsis ua. Yog tias Gibbs Dawb Zog yog qhov tsis zoo, ces cov tshuaj tiv thaiv yog tshwm sim, thiab yog tias nws yog qhov zoo, ces nws tsis yog tshwm sim
Puas yog ntsev yaj hauv dej spontaneous?
Kev daws ntawm NaCl hauv dej muaj ntau qhov kev txiav txim tsawg dua li cov dej ntshiab thiab cov ntsev crystalline. Entropy nce txhua lub sij hawm ib tug solute dissolves nyob rau hauv ib tug hnyav. Txawm hais tias qhov hloov pauv enthalpy yog tus lej zoo, qhov kev sib cais yog tshwm sim vim hais tias Gibbs tsis muaj zog hloov pauv, G, yog qhov tsis zoo vim lub sij hawm entropy
Dab tsi yog txheej txheem spontaneous thiab non-spontaneous txheej txheem?
Cov txheej txheem spontaneous yog ib qho uas tshwm sim yam tsis muaj kev cuam tshuam ntawm sab nraud. Ib txoj kev uas tsis yog tshwm sim yuav tsis tshwm sim yog tias tsis muaj kev cuam tshuam ntawm sab nraud
Dab tsi yog tiam spontaneous thiab leej twg disproved txoj kev xav?
Rau ntau centuries ntau tus neeg ntseeg nyob rau hauv lub tswvyim ntawm spontaneous tiam, lub creation ntawm lub neej los ntawm cov organic teeb meem. Francesco Redi disproved spontaneous tiam rau cov kab mob loj los ntawm kev qhia tias maggots tshwm sim los ntawm cov nqaij tsuas yog thaum yoov tso qe rau hauv cov nqaij
Dab tsi yog qhov flux los ntawm lub voos xwmfab ntawm sab yog tias tus nqi ntawm Q yog ntawm ib qho ntawm nws lub ces kaum?
Raws li peb paub tias, tag nrho cov flux los ntawm tus nqi q yog q / ε 0 (Gauss txoj cai). Yog hais tias tus nqi yog nyob rau ntawm lub ces kaum ntawm lub voos xwmfab, ib co ntawm cov flux nkag mus rau hauv lub voos xwmfab thiab tawm los ntawm ib co ntawm nws lub ntsej muag. Tab sis qee qhov flux tsis nkag mus rau hauv lub voos xwmfab. Qhov 1/8th no yuav muab faib ua 3 ntu dua