Qhov sib txawv tseem ceeb ntawm cov concentration cell thiab tshuaj cell yog tias, hauv cov hlwb concentration, cov khoom ntawm ob ib nrab hlwb zoo ib yam li qhov, nyob rau hauv cov tshuaj hlwb, cov compositions yuav los yog tsis zoo sib xws.
Kev sib zog ntawm tes yog hom hluav taws xob hluav taws xob. Muaj ob hom hluav taws xob hluav taws xob lossis cov tshuaj lom neeg xws li galvanic cells thiab electrolytic cells. Lub cell concentration yog ib hom galvanic cell.
Lub Cev Cuam Tshuam yog dab tsi?
Kev sib txuas ntawm tes yog ib hom galvanic cell uas ob ib nrab ntawm cov cell zoo sib xws hauv cov khoom sib xws. Yog li ntawd, peb hais ob ib nrab hlwb sib npaug. Lawv tsuas yog txawv ntawm qhov concentration. Qhov hluav taws xob tsim los ntawm lub xovtooj ntawm no yog qhov me me vim tias lub xovtooj ntawm tes no zoo li tau txais lub xeev sib npaug. Qhov sib npaug los thaum cov concentrations ntawm ob lub hlwb ib nrab ua sib npaug.
Lub cell concentration tsim hluav taws xob los ntawm kev txo qis ntawm lub zog tsis muaj zog ntawm lub cev. Txij li thaum muaj pes tsawg leeg ntawm ib nrab hlwb zoo sib xws, tib cov tshuaj tiv thaiv tshwm sim, tab sis nyob rau hauv opposite lus qhia. Yog li, cov txheej txheem no ua rau kom cov concentration ntawm qis concentration ntawm tes thiab txo cov concentration ntawm cov concentration ntau dua. Raws li cov hluav taws xob ntws, thermal zog yog generated. Lub cell absorbs lub zog no raws li cua sov. Muaj ob hom ntawm cov cell concentration raws li hauv qab no:
- Electrolyte concentration cell - cov electrodes yog tsim los ntawm tib yam khoom, thiab ib nrab hlwb muaj tib lub electrolyte nrog ntau concentrations
- Electrode concentration cell - ob lub electrodes (ntawm tib yam khoom) ntawm cov concentrations sib txawv yog dipped nyob rau hauv tib electrolyte
Dab tsi yog Tshuaj Cell
Ib lub xovtooj ntawm tes, ntau dua ib lub xovtooj ntawm electrochemical, yog lub kaw lus (ib qho khoom siv) uas tuaj yeem tsim hluav taws xob los ntawm cov tshuaj tiv thaiv spontaneous. Cov tshuaj tiv thaiv tshuaj uas koom nrog hauv cov txheej txheem no hu ua redox reactions. Cov tshuaj tiv thaiv no tshwm sim los ntawm kev hloov ntawm electrons ntawm cov tshuaj lom neeg. Tsis tas li ntawd, cov tshuaj tiv thaiv redox muaj ob qhov kev tshwm sim ib nrab hu ua oxidation cov tshuaj tiv thaiv thiab txo cov tshuaj tiv thaiv. Thaum cov tshuaj tiv thaiv oxidation ib txwm tso cov hluav taws xob rau hauv lub cev, kev txo qis coj cov hluav taws xob los ntawm lub cev. Yog li, peb tuaj yeem hais tias ob qhov kev tawm tsam ib nrab tshwm sim ib txhij.
Muaj ob hom electrochemical hlwb li voltaic (galvanic) cell thiab electrolytic cells. Ib tug electrochemical cell yog tsim los ntawm ob ib nrab hlwb. Ib nrab-reactions tshwm sim nyob rau hauv cov ob ib nrab hlwb. Ntxiv mus, cov tshuaj tiv thaiv uas tshwm sim hauv ib lub xovtooj ua rau muaj qhov sib txawv ntawm ob ib nrab hlwb.
Daim duab 01: Ib qho yooj yim Galvanic Cell
Ib nrab ntawm tes feem ntau muaj cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob. Yog li ntawd, ib tug ua tiav electrochemical cell muaj ob electrodes thiab ob electrolytes; ob lub hlwb ib nrab tej zaum yuav siv tib lub electrolyte. Yog tias muaj ob qhov sib txawv ntawm cov electrolytes, ces siv cov ntsev ntsev los tswj kev sib cuag ntawm cov electrolytes. Thiab, qhov no yog ua los ntawm kev ua ib qho kev hloov ions los ntawm tus choj ntsev. Cov electrons ntws los ntawm ib nrab ntawm tes mus rau lwm qhov los ntawm ib qho hluav taws xob sab nraud. Peb hu ob lub electrodes anode thiab cathode.
Ntxiv mus, oxidation thiab txo cov tshuaj tiv thaiv tshwm sim hauv ob lub electrodes nyias. Thaum cov tshuaj tiv thaiv oxidation tshwm sim hauv anode, qhov txo qis tshwm sim hauv cathode. Yog li ntawd, electrons yog tsim nyob rau hauv lub anode thiab lawv txav los ntawm lub anode mus rau cathode los ntawm sab nraud Circuit Court. Tus choj ntsev pab tswj lub kaw lus nruab nrab (hluav taws xob) los ntawm kev hloov ions los ntawm nws kom sib npaug ntawm cov nqi hluav taws xob.
Dab tsi yog qhov sib txawv ntawm Concentration Cell thiab Chemical Cell?
Kev sib xyaw ntawm tes yog hom hluav taws xob hluav taws xob. Muaj ob hom tshuaj hlwb; lawv yog cov galvanic hlwb thiab electrolytic hlwb. Lub concentration cell yog ib hom galvanic cell. Qhov sib txawv tseem ceeb ntawm cov concentration cell thiab tshuaj cell yog tias nyob rau hauv cov concentration cell, muaj pes tsawg leeg ntawm ob ib nrab hlwb zoo ib yam li thaum, nyob rau hauv cov tshuaj hlwb, cov compositions tej zaum yuav los yog yuav tsis zoo sib xws.
Hauv qab no yog cov ntsiab lus ntawm qhov sib txawv ntawm cov concentration ntawm tes thiab tshuaj cell.
Summary – Concentration Cell vs Chemical Cell
Kev sib zog ntawm tes yog hom hluav taws xob hluav taws xob. Muaj ob hom tshuaj (electrochemical) cell tuaj yeem ua galvanic cells thiab electrolytic cells. Kom meej meej, lub concentration cell yog ib hom galvanic cell. Qhov sib txawv tseem ceeb ntawm cov concentration ntawm tes thiab cov tshuaj cell yog tias nyob rau hauv cov concentration ntawm cov hlwb muaj pes tsawg leeg ntawm ob ib nrab hlwb zoo ib yam li thaum nyob rau hauv tshuaj hlwb cov compositions tej zaum yuav los yog tsis zoo sib xws.
