Qhov sib txawv tseem ceeb ntawm electrochemical cell thiab galvanic cell yog tias feem ntau cov hluav taws xob hluav taws xob yuav hloov hluav taws xob rau hauv hluav taws xob hluav taws xob, hos galvanic cells yuav hloov cov hluav taws xob rau hluav taws xob.
Oxidation thiab txo cov tshuaj tiv thaiv ua lub luag haujlwm tseem ceeb hauv electrochemistry. Nyob rau hauv ib qho oxidation-txo cov tshuaj tiv thaiv, electrons raug xa los ntawm ib qho reactant mus rau lwm tus. Cov khoom uas lees txais electrons yog tus neeg sawv cev txo qis, hos cov khoom uas muab cov hluav taws xob tam sim no yog oxidizing tus neeg sawv cev. Tus neeg saib xyuas kev txo qis yog lub luag haujlwm rau txo lwm cov reactant thaum tab tom oxidation nws tus kheej; rau tus neeg sawv cev oxidizing, qhov no yog vice versa. Cov kev tshwm sim no tshwm sim nyob rau hauv ob ib nrab-reactions los qhia cais oxidation thiab txo; yog li ntawd, nws qhia cov xov tooj ntawm electrons txav los yog tawm.
Electrochemical Cell yog dab tsi?
Ib lub xov tooj ntawm tes electrochemical yog kev sib xyaw ua ke ntawm kev txo qis thiab oxidizing tus neeg sawv cev, uas yog lub cev sib cais ntawm ib leeg. Feem ntau, peb ua qhov kev sib cais los ntawm tus choj ntsev. Txawm hais tias lawv yog lub cev sib cais, ob qho tib si ib nrab-hlwb yog nyob rau hauv tshuaj sib cuag nrog ib leeg. Electrolytic thiab galvanic hlwb yog ob hom electrochemical hlwb.
Oxidation-txo cov tshuaj tiv thaiv tshwm sim nyob rau hauv ob qho tib si electrolytic thiab galvanic hlwb. Yog li ntawd, nyob rau hauv ib tug electrochemical cell, muaj ob electrodes li anode thiab cathode. Ob lub electrodes sab nraud txuas nrog lub siab tiv thaiv voltmeter; Yog li, tam sim no tsis muaj kev sib kis ntawm cov electrodes. Yog li, qhov voltmeter no pab tswj tau qee qhov hluav taws xob ntawm cov electrodes qhov twg oxidation tshwm sim.
Daim duab 01: Electrochemical Cell
Cov tshuaj tiv thaiv Oxidation tshwm sim ntawm qhov anode, thaum qhov kev txo qis tshwm sim ntawm cathode. Peb yuav tsum raus lawv nyob rau hauv cais electrolyte daws. Feem ntau, cov kev daws teeb meem no yog cov kev daws teeb meem ionic ntsig txog hom electrode. Piv txwv li, peb raus tooj liab electrodes nyob rau hauv ib tug tooj liab sulfate tov thiab nyiaj electrodes nyob rau hauv ib tug silver chloride tov. Cov kev daws teeb meem no txawv; yog li ntawd, lawv yuav tsum sib cais. Txoj kev tshaj plaws los cais lawv yog tus choj ntsev. Nyob rau hauv ib qho hluav taws xob hluav taws xob, lub zog hluav taws xob ntawm tes hloov mus rau hluav taws xob tam sim no, uas peb tuaj yeem siv los teeb lub teeb lossis ua lwm yam hluav taws xob ua haujlwm.
Dab tsi yog Galvanic Cell?
Galvanic lossis voltaic cells khaws cov hluav taws xob hluav taws xob. Cov roj teeb yog tsim los ntawm cov kab hluav taws xob galvanic los tsim cov hluav taws xob ntau dua. Cov tshuaj tiv thaiv ntawm ob lub electrodes hauv galvanic cell zoo li mus spontaneously. Thaum cov kev tshwm sim tshwm sim, muaj qhov ntws ntawm electrons los ntawm anode mus rau cathode ntawm tus neeg xyuas pib sab nraud.
Daim duab 02: Ib Lub Cell Galvanic
Piv txwv li, yog tias ob lub electrodes yog nyiaj thiab tooj liab hauv Galvanic cell, cov nyiaj electrode yog qhov zoo ntawm kev hwm rau tooj liab electrode. Cov tooj liab electrode yog lub anode, thiab nws dhau oxidation cov tshuaj tiv thaiv thiab tso tawm electrons. Cov electrons no mus rau cov nyiaj cathode ntawm sab nraud Circuit Court. Li no, silver cathode undergoes txo cov tshuaj tiv thaiv. Lub peev xwm sib txawv yog tsim los ntawm ob lub electrodes, uas tso cai rau cov electron ntws. Hauv qab no yog cov tshuaj tiv thaiv ntawm tes ntawm lub cev Galvanic saum toj no.
2 Ag+ (aq) + Cu(s) ⇌ 2Ag(s) + Cu2+ (aq)
Qhov txawv ntawm Electrochemical Cell thiab Galvanic Cell yog dab tsi?
Muaj ob hom hluav taws xob hluav taws xob ua cov cell electrolytic thiab galvanic cells. Qhov sib txawv tseem ceeb ntawm electrochemical cell thiab galvanic cell yog tias feem ntau cov hluav taws xob hluav taws xob yuav hloov hluav taws xob mus rau hauv cov hluav taws xob hluav taws xob, thaum galvanic hlwb yuav hloov cov hluav taws xob rau hauv hluav taws xob. Tsis tas li ntawd, nyob rau hauv feem ntau electrochemical hlwb xws li electrolytic hlwb, lub anode yog qhov zoo davhlau ya nyob twg thaum lub cathode yog qhov tsis zoo terminal; Txawm li cas los xij, hauv galvanic cell, lub anode yog lub davhlau ya nyob twg tsis zoo thiab cathode yog qhov zoo kawg nkaus.
Ntxiv mus, qhov sib txawv ntxiv ntawm electrochemical cell thiab galvanic cell yog nyob rau hauv electrochemical hlwb, xws li electrolytic cells, non-spontaneous chemical tshua tshwm sim, tab sis nyob rau hauv galvanic hlwb, spontaneous tshuaj tiv thaiv tshwm sim.
Summary - Electrochemical vs thiab Galvanic Cell
Muaj ob hom hluav taws xob hluav taws xob ua cov cell electrolytic thiab galvanic cells. Qhov sib txawv tseem ceeb ntawm electrochemical cell thiab galvanic cell yog tias feem ntau cov hluav taws xob hluav taws xob yuav hloov hluav taws xob rau hauv cov hluav taws xob hluav taws xob, qhov galvanic hlwb yuav hloov cov hluav taws xob rau hauv hluav taws xob.
