Ngā Āhuatanga Ā-tinana me te Matū o ngā Hauwaiwaro
Ko ngā hauwaiwaro he matū e titoa ana i ngā ngota waro (C) me te hauwai (H). Ko ēnei ngā wāhanga matua o ngā wahie pūmua pērā i te hinu, te hau māori, me te waro. Hei tētahi o ngā momo matū waro māmā rawa atu, nui rawa atu hoki, he maha ngā āhuatanga ā-tinana me te matū o ngā hauwaiwaro e pā ana ki tō rātou whakamahinga i roto i ngā momo tono, inā koa i roto i ngā ahumahi pūngao me te matū. I roto i tēnei tuhinga, ka matapakihia e mātou ngā āhuatanga ā-tinana me te matū o ngā hauwaiwaro, tae atu ki tō rātou whakarōpūtanga, hanganga, tauhohenga, me ngā whakamahinga.
Te Whakarōpūtanga o te Waikawa
Ka taea te whakarōpū i ngā hauwaiwaro ki ētahi rōpū maha i runga i tō rātou hanganga ngota:
1. Ngā Ārane (Parafini): Ngā warowaihā kukū me ngā hononga takitahi i waenga i ngā waro.
2. Ngā Ārkene (Olefin): Ngā warowaihā kore-mākū me te kotahi, neke atu rānei ngā here takirua waro-waro.
3. Ārikini (Ātirenini): Ngā hauwaiwai kore-mākū me te kotahi, neke atu rānei ngā here takitoru waro-waro.
4. Kakara: Ngā hauwaiwaro kei roto he mowhiti benzene, he hanganga rite rānei me ngā hononga takitahi me ngā hononga takirua e taupatupatu ana.
Ngā Āhuatanga Ā-tinana o ngā Hauwaiwaro
He nui te awe o te hanganga ngota me ngā momo hononga i waenga i ngā ngota waro me te hauwai ki ngā āhuatanga ā-tinana o ngā hauwai waro. Ko ētahi o ngā āhuatanga ā-tinana nui ko:
1. Te Ira Kohua me te Ira Rewa:
– Ngā ārani: Ka piki ake ngā ira kohua me ngā ira rewa i te roa haere o te mekameka waro. Ko ngā matū ngāwari pēnei i te methane (CH4) he hau i te pāmahana rūma, ko ngā matū he roa ake ngā mekameka waro he wai, he totoka rānei.
– Ngā Ākene me ngā Ākene: I te nuinga o te wā, he iti ake te kohua o ēnei i ngā ākene he rite te maha o ngā ngota waro. Nā te noho mai o ngā hononga takirua, ka ngoikore ake ngā taunekeneke i waenga i ngā ngota.
– Kakara: He nui ake te kohua me te rewa o te mea nā te hanganga mowhiti benzene pumau.
2. Te wairewatanga:
– He kore-pūmua te nuinga o ngā hauwaiwaro, nō reira kāore e wairewa i roto i te wai, engari ka wairewa i roto i ngā whakarewa waro pērā i te etera, te kōroforma, me te etanoru.
3. Te Pūngao:
– Ko ngā hauwaiwaro he mea kore-polar i te nuinga o te wā. Nā te mea he tata ōrite te kaha o ngā here C-H, ka hua ake he tohatoha ōrite o ngā irahiko.
4. Te Matotoru:
– He iti ake te mātotoru o ngā hauwaiwaro i te wai, ā, ka mānu i runga i te mata o te wai ina whakaranua.
5. Tae me te Kakara:
– Ko ngā warowaihā māmā he kore tae, he kore kakara hoki, engari ko ētahi warowaihā kakara he kakara motuhake nā te hanganga o te benzene.
Ngā Āhuatanga Matū o ngā Hauwaiwaro
Ko ngā āhuatanga matū o ngā warowaihā e wehewehe ana i tētahi momo i tētahi atu ko te tauhohenga matū, ngā tauhohenga noa, me te pumau matū.
1. Ngā ārani:
– Te Tauhohenga: Kāore ngā ārani i te tino tauhohe nā te mea he hononga kotahi (sigma) kaha, pumau hoki ngā here waro-waro me te waro-hauwai katoa.
– Te tahunga: Ko tētahi o ngā tauhohenga matū matua ko te tahunga. Ka tahuna ngā ārani ki te hāora hei whakaputa i te hauhā waro me te wai, ka tukuna he nui te wera. Ka taea te tuhi i te tauhohenga tahunga mō te methane penei:
\[
CH_4 + 2O_2 \rightarrow CO_2 + 2H_2O + Wera
\]
– Te Hārogenasi: He mea noa anō hoki ngā tauhohenga pēnei i te hārogenasi me te chlorine, te bromine rānei i raro i ētahi tikanga.
2. Ngā ākene:
– Te Tauhohenga: He nui ake te tauhohenga o ngā alkene i ngā alkene nā te mea he ngāwari ake te pakaru o te hononga takirua (pi).
– Ngā Tauhohenga Tāpiri: He tauhohenga noa te tāpiri o te hauwai (hauwaitanga), ngā halogen (hauwaitanga), ngā halide hauwai (HCl, HBr), me te wai (waihanga). Hei tauira, ka tauhohe te ethene ki te bromine hei whakaputa i te dibromoethane:
\[
CH_2=CH_2 + Br_2 \rightarrow CH_2Br-CH_2Br
\]
3. Ngā ārikini:
– Te Tauhohenga: Pērā i ngā alkene, he nui ake te tauhohenga o ngā alkyne i ngā alkane nā te mea ka ngawari te motu o te hononga takitoru.
– Ngā Tauhohenga Tāpiri: Ka puta anō hoki te tāpiritanga o te hauwai, ngā halogen, me ngā hauwai halide i roto i ngā alkyne.
4. Kakara:
– Te Tauhohenga: He rerekē te whanonga o te kakara nā ngā irahiko π kua tangohia te rohe i roto i te mowhiti benzene, ā, he tino pumau. Heoi, ka pāngia rātou e ngā tauhohenga whakakapinga kakara hiko-aroha pērā i te nitration, te sulfonation, me te halogenation.
– Whakakapinga Hiko-ā-Irahiko: Kei roto i tēnei tauhohenga te whakakapinga o te ngota hauwai i runga i te mowhiti benzene ki tētahi atu rōpū whakakapinga, hei tauira, te nitration o te benzene:
\[
C_6H_6 + HNO_3 \perematau C_6H_5NO_2 + H_2O
\]
Ngā Whakamahinga me ngā Whakamahinga o ngā Hauwaiwaro
Nā ōna āhuatanga ā-tinana me ā-matū, he whānuitia ngā whakamahinga o ngā warowaihā:
1. Pūngao:
– Ko ngā hauwaiwaro te pūtake matua o te wahie mō ngā mahi o te whare me ngā mahi ahumahi, pērā i te penehīni, te tīhiera, te hinu matū waikura (LNG), me te hinu hinu pēpi (LPG).
2. Ngā Rauemi Matū Mata:
– He rauemi mata nui ngā hauwaiwaro i roto i te umanga hinu matū, e whakaputa ana i ngā kirihou, ngā rongoā, me ētahi atu hua matū. Hei tauira, ko te ethylene te rauemi mata matua mō te hanga polyethylene.
3. Ngā hinu whakahinuhinu me ngā whakarewa:
– E whakamahia ana ngā hinu whakahinuhinu me ngā whakarewa waro kei roto i te hauwai i roto i ngā mīhini ahumahi, me te horoi hoki.
4. Ahumahi Hikohiko:
– Ka whakamahia ētahi warowaihā ki te hanga i ngā haurua-haurua me ngā wāhanga hiko.
Te Katinga
He mea nui te mahi a ngā hauwaiwaro i roto i te ao hou, me ō rātou hanganga rerekē me ō rātou āhuatanga ā-tinana me ā-matū. Mai i ngā wahie o ia rā ki ngā rauemi nui i roto i te hanga, ko te mārama ki ngā āhuatanga o ngā hauwaiwaro te mea nui ki te auahatanga me ngā tono whai hua ake puta noa i te whānuitanga o ngā hangarau me ngā ahumahi. Mā te haere tonu o ngā whanaketanga rangahau me te hangarau, ka haere tonu te whānui o te whakamahinga o ngā hauwaiwaro, ka akiaki i te ahunga whakamua puta noa i ngā momo rāngai o te ao.
