Zitsanzo za Mafunso Okhudza Kuyerekeza kwa Maselo a Voltaic ndi Maselo a Electrolytic
Kuyerekeza pakati pa maselo a voltaic ndi maselo a electrolytic ndi nkhani yofunika kwambiri mu chemistry, makamaka pakuphunzira za electrochemistry. Zonsezi ndi zipangizo zomwe zimagwiritsidwa ntchito popanga magetsi kuchokera ku zochita za mankhwala kapena kutsogolera zochita za mankhwala pogwiritsa ntchito mphamvu zamagetsi. Nkhaniyi iwonetsa kusiyana kwakukulu pakati pa maselo a voltaic ndi maselo a electrolytic kudzera mu zitsanzo za mavuto ndi zokambirana. Cholinga chake ndikupereka kumvetsetsa bwino mitundu iwiri ya maselo.
Selo ya Voltaic
Selo ya voltaic, yomwe imadziwikanso kuti galvanic cell, ndi mtundu wa selo ya electrochemical yomwe imapanga magetsi kuchokera ku reaction ya chemical yodzidzimutsa. Mu selo ya voltaic, redox reaction imachitika, komwe kuchepetsa ndi kukhuthala kumachitika pa ma electrode osiyanasiyana. Kuti timvetse bwino izi, tiyeni tiwone chitsanzo cha selo ya voltaic.
Chitsanzo cha Funso 1:
Anode ya selo ya voltaic imapangidwa ndi zinc (Zn) ndi cathode ya mkuwa (Cu). Tiyerekeze kuti kuyang'ana tebulo la potentials yochepetsera yokhazikika kukuwonetsa kuti potential yochepetsera yokhazikika (E°) ya Cu²⁺/Cu ndi +0,34 V ndipo ya Zn²⁺/Zn ndi -0,76 V. Werengani potential ya selo ya voltaic yokhazikika (E° cell) ya selo ya voltaic iyi.
Kukambirana:
Choyamba, lembani zomwe zimachitika theka la maselo kuti ziwonjezeke komanso kuchepetsa.
– Anode (Kusungunuka): Zn(s) → Zn²⁺(aq) + 2e⁻
- Cathode (Kuchepetsa): Cu²⁺(aq) + 2e⁻ → Cu(s)
Mphamvu ya maselo yokhazikika (E° cell) imawerengedwa kuchokera ku kusiyana kwa mphamvu yochepetsera ya cathode ndi anode.
– E° cell = E° cathode – E° anode
– E° cathode = +0,34 V
– E° anode = -0,76 V
Kotero mphamvu ya maselo yokhazikika ndi iyi:
\[ E°_{sel} = 0.34V – (-0.76V) \]
\[ E°_{selo} = 0.34V + 0.76V \]
\[ E°_{sel} = 1.10V \]
Chifukwa chake, mphamvu ya selo ya voltaic iyi ndi 1,10 V.
Selo ya Electrolytic
Koma maselo a electrolytic amagwiritsa ntchito mphamvu zamagetsi kuti apangitse kuti zochita za mankhwala zosachitika mwadzidzidzi zichitike. Mu selo ya electrolytic, mphamvu yamagetsi yochokera ku gwero lakunja imagwiritsidwa ntchito kuyendetsa redox reaction yomwe singachitike yokha. Tiyeni tiwone chitsanzo cha selo ya electrolytic kuti timvetse bwino makhalidwe ake ndi mfundo zake zogwirira ntchito.
Chitsanzo cha Funso 2:
Mu njira ya electrolysis, aluminiyamu imapangidwa kuchokera ku aluminium oxide yosungunuka (Al₂O₃). Werengani kuchuluka kwa magetsi ofunikira kuti mupange mole imodzi ya aluminiyamu (Al). Tangoganizani kuti mole imodzi ya Al imafuna ma mole atatu a ma elekitironi.
Kukambirana:
Malinga ndi equation ya electrochemical ya electrolysis:
\[ Al^{3+}(aq) + 3e⁻ → Al(zi) \]
Amadziwika kuti pa mole iliyonse ya aluminiyamu, ma mole atatu a ma elekitironi amafunika. Malinga ndi lamulo la Faraday, kuchuluka kwa magetsi (Q) komwe kumafunikira kumatha kuwerengedwa pogwiritsa ntchito njira iyi:
\[ Q = n \cdot F \]
Kumene:
- n ndi chiwerengero cha ma moles a ma elekitironi
– F ndi chinthu chosasinthika cha Faraday (96500 C/mol electrons)
Kupanga mole imodzi ya Al:
\[ n = 3 \malemba{ mamolekyu a ma elekitironi} \]
Motero, kuchuluka kwa magetsi (Q):
\[ Q = 3 \cdot 96500 \]
\[ Q = 289500 \malemba{ C} \]
Choncho, kuti apange mole imodzi ya aluminiyamu, pamafunika ma coulombs 289500 amagetsi.
Kuyerekeza kwa Maselo a Voltaic ndi Maselo a Electrolytic
Gome lotsatirali likufotokoza mwachidule kusiyana kwakukulu pakati pa maselo a voltaic ndi maselo a electrolytic:
| Mbali | Selo ya Voltaic | Selo ya Electrolytic |
|————————–|———————————|—————————–|
| Magwero a Mphamvu | Machitidwe a Mankhwala | Mphamvu Zamagetsi |
| Mtundu wa Kuyankha | Mwadzidzidzi | Osachita mwadzidzidzi |
| Anode (-)/Cathode (+) | Anode (-), Cathode (+) | Anode (+), Cathode (-) |
| Cholinga | Kupanga magetsi | Kuyambitsa zotsatira za mankhwala |
| Ntchito | Mabatire, maselo amafuta | Kupaka, kuponyera zitsulo, kuyeretsa |
Magwero a Mphamvu:
Maselo a voltaic amapanga mphamvu zamagetsi kuchokera ku zochita za mankhwala zodzidzimutsa, pomwe maselo a electrolytic amagwiritsa ntchito mphamvu zamagetsi kuchokera ku gwero lakunja kuti akakamize zochitika zosadzidzimutsa kuchitika.
Mtundu wa Chiyankho:
Mu selo ya voltaic, reaction yodzidzimutsa imapangitsa ma elekitironi kuyenda kuchokera ku anode kupita ku cathode kudzera mu dera lakunja. Mu selo ya electrolytic, mphamvu yamagetsi yakunja imagwiritsidwa ntchito kuyendetsa reaction yomwe singachitike yokha.
Anode ndi Cathode:
Mu selo ya voltaic, anode ndi electrode yoyipa ndipo cathode ndi electrode yabwino. Mu selo ya electrolytic, anode ndi electrode yabwino ndipo cathode ndi electrode yoyipa. Ichi ndi chimodzi mwa kusiyana kwakukulu komwe nthawi zambiri kumasokoneza ophunzira.
Cholinga:
Cholinga chachikulu cha selo la voltaic ndikupanga magetsi, pomwe selo la electrolytic limagwiritsidwa ntchito kuyambitsa zochitika za mankhwala, monga kuyenga zitsulo kapena electrolysis ya madzi.
Mapulogalamu:
Maselo a voltaic amagwiritsidwa ntchito kwambiri m'mabatire ndi ma cell amafuta, omwe amapanga magetsi ogwiritsidwa ntchito m'njira zosiyanasiyana. Maselo a electrolytic amagwiritsidwa ntchito m'mafakitale monga kuponya zitsulo, kuyika ma electroplating, ndi kuyeretsa zitsulo.
Mapeto
Maselo onse a voltaic ndi electrolytic amasewera gawo lofunikira kwambiri muukadaulo wamakono. Kumvetsetsa momwe mtundu uliwonse wa selo umagwirira ntchito komanso momwe mungawerengere magawo osiyanasiyana omwe akukhudzidwa kudzera mu zitsanzo zamavuto ndikofunikira kwambiri kuti muphunzire bwino mfundo za electrochemistry. Mu zokambirana zomwe zili pamwambapa, tawonetsa kusiyana kwakukulu pakati pa maselo a voltaic ndi electrolytic, kuphatikiza magwero awo a mphamvu, mitundu ya reaction, ndi zitsanzo za momwe amagwiritsidwira ntchito tsiku ndi tsiku.
Mukamvetsetsa bwino mitundu iwiriyi ya maselo, mudzakhala okonzeka bwino kuthetsa mavuto osiyanasiyana okhudzana ndi mayeso a chemistry ndikuzigwiritsa ntchito pazida ndi ukadaulo wamakono.
