Mitemo Yekutanga yeKemistri: Nheyo Dzinotungamira Kemistri Yemazuva Ano
Pendauluan
Kemistri ibazi resainzi yechisikigo rinoongorora maumbirwo, chimiro, hunhu, uye shanduko yezvinhu. Seri kwemashiripiti ekuita kwemakemikari anosarudza hunhu nekuchinja kwezvinhu kune misimboti mikuru inozivikanwa semitemo mikuru yekemistri. Mitemo iyi haingoumbi chete hwaro hweruzivo rwemakemikari asiwo inoita basa rakakosha mukukura kwesainzi netekinoroji. Muchinyorwa chino, tichaongorora mimwe yemitemo mikuru yekemistri yakatungamira budiriro yevanhu kusvika pakunzwisisa kwakadzama kwenyika yakaipoteredza.
1. Mutemo weKuchengetedza Misa
Mutemo weKuchengetedza Misa, unozivikanwawo seMutemo waLavoisier, wakatumidzwa zita raAntoine Lavoisier, uyo akaugadzira muzana remakore rechi18. Mutemo uyu unoti huremu hwechinhu chiri muhurongwa hwakavharwa hunoramba hwakafanana, zvisinei nekuti rudzii rwekuchinja kwemakemikari runoitika. Nemamwe mashoko, huremu hwese hwezvinhu zvinogadziriswa mukuita kwemakemikari hwakaenzana nehuremu hwese hwezvigadzirwa zvinogadzirwa.
Muenzaniso wakapfava wemutemo uyu unogona kuonekwa mukubatidzwa kwekenduru. Kunyangwe wakisi ichiita seinodzikira zvakanyanya painotsva, huwandu hwezvinhu zvinobva mukubatidzwa (carbon dioxide nemhepo inopisa) kana zvikayerwa nemazvo huchaenzana nehuremu hwewakisi neokisijeni zvakabatidzwa.
Mutemo weKuchengetedza Misa unoumba hwaro hwekuongorora huwandu hwezvinhu mukuita kwemakemikari uye unobvumira masayendisiti kunyora zviyero zvemakemikari zvakaringana.
2. Mutemo weZvikamu Zvisingaperi (Mutemo waProust)
Nyanzvi yemakemikari yekuFrance Joseph Proust mukupera kwezana remakore rechi18 akagadzira Mutemo weDefinite Proportions, uyo unoti kemikari imwe chete inogara iine zvinhu zvayo muhuwandu hwakaenzana hwehuwandu, zvisinei nekuti zvinobva kupi kana kuti nzira yekuumbwa kwayo.
Semuenzaniso, molekyuru yemvura (H₂O) zvisinei nekuti inobva kupi—ingava mvura, dziva, kana chero imwe nzvimbo—inogara iine maatomu maviri ehydrogen neatomu rimwe chete reokisijeni muhuwandu hwakatarwa hwemasasi (inenge 1:8).
Mutemo uyu wakakosha zvikuru mukugadzirwa kwemafomura emakemikari anowirirana uye ndiwo hwaro hwekuedza kuchena kwemakemikoro.
3. Mutemo weZvikamu Zvakawanda
John Dalton, nyanzvi yesainzi yeChirungu inozivikanwa nedzidziso yake yemaatomu, akatanga Mutemo weZvikamu Zvakasiyana-siyana pakutanga kwezana remakore rechi19. Mutemo uyu unoti, kana zvinhu zviviri zvichigona kuumba zvinhu zvinopfuura chimwe chete, huwandu hwechinhu chimwe chete pamwe chete nehuremu hwakagadzika hwechimwe chinhu huchava muhuwandu hwenhamba yakazara.
Semuenzaniso, kabhoni neokisijeni zvinogona kugadzira makemikari maviri akasiyana: kabhoni monoxide (CO) nekabhoni dhayokisaidhi (CO₂). MuCO₂, chiyero chehuremu hwekabhoni neokisijeni i12:16 (kana 3:4), nepo muCO₂, chiyero chehuremu hwekabhoni neokisijeni i12:32 (kana 3:8). Chiyero ichi (4:8 kana 1:2) muenzaniso wakakwana wezviyero zvakawanda.
Mutemo weZvikamu Zvakasiyana-siyana wakasimbisa pfungwa yemaatomu uye wakaunza pfungwa yekuti maatomu ndiwo mayuniti madiki ezvinhu zvinobatanidzwa mukuita kwemakemikari.
4. Mutemo weGasi Wakanaka (Mutemo waAvogadro)
Amedeo Avogadro, nyanzvi yesainzi yekuItaly, akataura nezvepfungwa yekuti, pakupisa nekumanikidzwa kwakafanana, magasi akaenzana ane huwandu hwakaenzana hwemamorekuru. Iyi pfungwa, inozivikanwa seMutemo waAvogadro, yakaita basa guru mukuvandudzwa kwedzidziso yegasi rakakodzera uye thermodynamics.
Pamasvomhu, mutemo uyu unogona kutsanangurwa sePV = nRT, apo:
- P ndiyo kumanikidzwa kwegasi,
- V ndiyo huwandu hwegasi,
- n ndiyo nhamba yemamoles egasi,
- R ndiyo gasi risingaperi rinowanikwa pasi rose, uye
– T ndiyo tembiricha muKelvin.
Tichishandisa Mutemo waAvogadro, tinogona kunzwisisa kuti magasi anoita sei mumamiriro akasiyana uye kufanotaura shanduko mumagasi zvichibva pakupisa, kumanikidzwa, uye huwandu.
5. Mutemo weKuenzana kweMakemikari (Mutemo waLe Chatelier)
Mutemo waLe Chatelier, wakatumidzwa zita raHenri Louis Le Chatelier, unoti kana sisitimu yekuenzanisa makemikari ikasangana nekuchinja kwemamiriro ezvinhu (kunyanya, kumanikidzwa, tembiricha), sisitimu yacho ichapindura nekushandura kuenzana munzira inoderedza shanduko.
Muenzaniso chaiwo unogona kuonekwa muindasitiri yemakemikari, senge kugadzirwa kweammonia (NH₃) kuburikidza nemaitiro eHaber. Kuwedzera kwekumanikidzwa kunochinja kuenzana kuenda pakuumbwa kweammonia yakawanda, zvichienderana nepfungwa yaLe Chatelier.
Mutemo uyu unokosha zvikuru mukudzora mashandiro emakemikari emuindasitiri kuti pave nehuwandu hwakawanda hwezvinobuda.
Mhedziso
Mitemo mikuru yekemistri ndiyo nheyo dzinotigonesa kunzwisisa nekufanotaura maitiro uye hunhu hwezvinhu. Mutemo weKuchengetedza Mass unotidzidzisa nezvekusachinja-chinja kwehukuru mumaitiro emakemikari, Mutemo weDefinite Proportions unovimbisa kuenderana kwemafomura emakemikari, Mutemo weMultiple Proportions unoratidza chimiro chemaatomu emakomputa, Mutemo waAvogadro unotsanangura maitiro emagasi, uye Mutemo waLe Chatelier unopa ruzivo pamusoro pesimba rekuenzanisa kwemakemikari.
Kunzwisisa zvakadzama mitemo iyi hakungoiti kuti zvive nyore kune masayendisiti nemainjiniya kugadzira matekinoroji matsva chete, asiwo kunotibvumira kunzwisisa zviri nani nyika isingaonekwe zvikuru inoumba hupenyu hwedu hwezuva nezuva. Kunzwisisa uku kwakakosha kunopa zambuko rekuvandudza nekuwana zvinhu zvitsva, zvichikurumidzisa kufambira mberi kwesainzi netekinoroji, uye pakupedzisira, budiriro yevanhu.
