Ikehu kūloko

Mea Kākau: Peter Berry
Lā O Ka Hana: 19 Iulai 2021
HōʻAno Hou I Ka Lā: 13 Mei 2024
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Anter

ʻO ka ikehu kūlokoWahi a ka Kumumanaʻo mua o Thermodynamics, ua hoʻomaopopo ʻia e pili ana i ka neʻe ʻana o nā huna i loko o kahi ʻōnaehana. ʻOkoʻa ia mai ka ikehu i kauoha ʻia o nā ʻōnaehana macroscopic, pili i nā mea neʻe, i pili ia i ka ikehu i loaʻa i nā mea ma kahi pālau microscopic a me ka mole.

A) ʻAe, hiki i kahi mea ke hoʻomaha loa a nele i ka ikehu ʻike ʻia (ʻaʻole hiki a ʻaʻole kinetic), akā e ʻōpala me nā molakeke neʻe, ke neʻe nei i nā wikiwiki kiʻekiʻe i kēlā me kēia kekona. ʻO ka ʻoiaʻiʻo, e ʻumeʻume a kipaku aku kēia mau mole i kekahi i kekahi ma muli o kā lākou kūlana kemika a me nā mea microscopic, ʻoiai ʻaʻohe neʻe e nānā ʻia i ka maka ʻōlohelohe.

Manaʻo ʻia ka ikehu kūloko i kahi nui, ʻo ia hoʻi, pili i ka nui o nā mea i kahi ʻōnaehana huna i hāʻawi ʻia. A laila loaʻa nā ʻano ʻē aʻe o ka ikehu uila, kinetic, kemika a me nā hiki i loko o nā ʻoma o kahi waiwai i hāʻawi ʻia.


Hōʻike maʻamau ʻia kēia ʻano ikehu e ka hōʻailona A I OLE.

Hoʻololi ikehu kūloko

ʻO ka ikehu kūloko hiki ke loli i nā ʻōnaehana huna, me ka nānā ʻole i ko lākou kūlana spatial a i ʻole ke kiʻi i loaʻa (i ke ʻano o nā wai a me nā kinoea). ʻO kahi laʻana, i ka hoʻolauna ʻana i ka wela i kahi ʻōnaehana paʻa o nā hunaahi, hoʻohui ʻia ka ikehu wela e hoʻopili i ka ikehu o loko o ka mea holoʻokoʻa.

Aka hoi, ikehu kūloko hekūlana kūlana, ʻo ia hoʻi, ʻaʻole ia e pili i ka hoʻololi e hoʻopili i nā mokuʻāina ʻelua o nā mea, akā i ke kūlana mua a me ka hope loa. ʻO ia ke kumu ʻo ka helu ʻana o ka loli o ka ikehu kūloko i kahi pōʻai i hāʻawi ʻia e zero mauno ka mokuʻāina hoʻomaka a me ka mokuʻāina hope hoʻokahi a like.

ʻO nā formulated e hoʻomaulia i kēia ʻano:

ΔU = UʻO B - A I OLETO, kahi i hele ai ka ʻōnaehana mai ka mokuʻāina A a i ka mokuʻāina B.


ΔU = -W, i nā hihia i hana ʻia ka nui o ka hana mechanical W, i hopena i ka hoʻonui ʻia ʻana o ka ʻōnaehana a me ka hōʻemi ʻana o kona ikehu kūloko.

ΔU = Q, i nā hihia a mākou e hoʻohui nei i ka ikehu wela e hoʻonui ai i ka ikehu o loko.

ΔU = 0, i nā hanana o nā hoʻololi cyclical o ka ikehu kūloko.

Hiki ke hōʻuluʻulu ʻia kēia mau hihia āpau a me nā mea ʻē aʻe i kahi kaulike e wehewehe ana i ka Manaʻo o ka mālama ʻana i ka ikehu i ka ʻōnaehana.

ΔU = Q + W

Nā laʻana o ka ikehu kūloko

  1. Nā Pahu. Aia i loko o ke kino o nā pila i hoʻoili ʻia i ka ikehu kūloko, mahalo i ka nā hopena kemika ma waena o nā waikawa a me nā metala kaumaha i loko. E ʻoi aku ka nui o ka ikehu kūloko ke pau kāna ukana uila a emi i ka wā i pau ai, ʻoiai i ka hihia o nā paila i hiki ke hoʻonui hou ʻia kēia ikehu ma ka hoʻolauna ʻana i ka uila mai ka mākeke.
  2. ʻO nā ʻenekini i hoʻopaʻa ʻia. Ke noʻonoʻo nei i nā ʻenekini e mālama i ka nui o ka ipu i loko o lākou i loko, no ka mea e loli ko lākou ikehu kūloko no ka mea ʻoi aku ka nui o kēia ākea a hoʻonui ʻia ke liʻiliʻi. No laila, ʻoi kahi gas i hoʻopuehu ʻia i loko o kahi lumi i ʻoi aku ka liʻiliʻi o ka ikehu o loko ma mua o ka wā o mākou e kaomi ai i ka paukū, no ka mea, e hoʻokau ʻia kāna mau ʻāpana.
  3. E hoʻonui i ka mahana o ka mea. Inā mākou e hoʻonui i ka mahana o, no ka laʻana, he gram o ka wai a me ka gram o ke keleawe, ma kahi o ka mahana o 0 ° C, e ʻike mākou ma muli o ka like o ka nui o nā mea, koi ka hau i ka nui o huina ikehu e hiki i ka mahana i makemake ʻia. ʻO kēia no ka mea ʻoi aku ka kiʻekiʻe o kāna wela kikoʻī, ʻo ia hoʻi, ʻaʻole hoʻolohe iki kāna mau ʻāpana i ka ikehu i hoʻolauna ʻia ma mua o nā keleawe, e hoʻonui mālie ana i ka wela i kona ikehu kūloko.
  4. E hoʻoluliluli i kahi wai. Ke hoʻoheheʻe mākou i ke kō a i ʻole ka paʻakai i ka wai, a i ʻole e paipai mākou i nā hui like, lulu mākou i ka wai me kahi mea kani e hoʻonui ai i ka hoʻopau nui ʻana. ʻO kēia ma muli o ka hoʻonui ʻia o ka ikehu kūloko o ka ʻōnaehana i hana ʻia e ka hoʻolauna ʻana o kēlā nui o ka hana (W) i hāʻawi ʻia e kā mākou hana, i ʻae ai i ka reactivity kemika ʻoi aku ma waena o nā ʻāpana i pili.
  5. Māhuo ka wai. Ke paila ʻia ka wai, e ʻike mākou i ka ʻoi aku o ka mahu i loko o ka wai wai i loko o ka ipu. ʻO kēia no ka mea, ʻoiai like nā molaki (ʻaʻole i loli ka hui), e hoʻoulu i ka hoʻololi o ke kino a mākou i hoʻohui ai i kahi nui o ka ikehu calories (Q) i ka wai, e hoʻoulu ai i kahi mea hoʻonāukiuki nui aʻe o kāna mau ʻāpana.

Nā ʻano ikehu ʻē aʻe

Ikehu kūponoIkehu mīkini
Ka mana HydroelectricIkehu kūloko
Mana uilaIkehu wela
Ikehu kemikaIkehu lā
Mana makaniIkehu nukelea
Ikehu KineticIkehu kani
Ikehu Kaloriikehu neaa
Ikehu Geothermal



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