Ki te pā atu ngā mea he rerekē te pāmahana ki a rātou anō, ka neke noa te wera mai i te mea he teitei ake te pāmahana ki te mea he iti iho te pāmahana. Ka mutu te whakawhiti wera ina tae ngā mea e rua ki te taurite wera . Ka taea te kī ko te whakawhiti wera ka puta he huringa o te pāmahana o ngā mea e pā ana. I runga i tēnei whakamārama poto, ka whakatauhia ko te wera (Q) e pā ana ki tētahi mea me te huringa o te pāmahana (delta T) o taua mea. He taumaha (m) tō ia mea, ā, he rerekē hoki te momo mea.
Mā te whakaaroaro ka puta te tauira wera o tēnei tuhinga. Ka taea e koe te whakamatau i te tika o tēnei whakaaroaro i runga i ō wheako o ia rā, i te whakahaere rānei i tētahi whakamātautau.
Te whanaungatanga i waenga i te wera (Q) me te huringa pāmahana (delta T)
E rua ngā ipu kua kī tonu i te wai he rite te taumaha. Ka whakamahanahia te wai mā te whakamahi i ngā mura e rua. He iti ake te mura o tētahi mura, he teitei ake te mura o tētahi mura. Mena ka whakamahanahia ngā mea e rua mō ngā meneti tekau, ko tēhea ipu he wera ake? Mena kua whakamahanahia e koe te wai, ka whakaae koe he wera ake te wai i whakamahanahia mā te whakamahi i te oumu me te mura teitei ake (he teitei ake te pāmahana whakamutunga o te wai, he nui ake rānei te huringa pāmahana).
Ko te mura e tohu ana i te nui o te wera (Q). He iti te wera o te mura iti, he nui te wera o te mura nui. Ina he iti te wera, he iti te huringa pāmahana. Ina he nui te wera, he nui te huringa pāmahana. Ka nui ake te wera, ka nui ake te huringa pāmahana. Ka taea te whakatau ko te nui o te wera (Q) he rite ki te huringa o te pāmahana o te mea.
Te whanaungatanga i waenganui i te wera (Q) me te papatipu o te mea (m)
E rua ngā ipu kua whakakīia ki te wai, he rerekē ngā taumaha, kotahi te ipu kua whakakīia ki te wai nui ake, ko tētahi atu ipu kua whakakīia ki te wai iti iho. Ka whakamahanatia te wai mā te whakamahi i ngā oumu e rua, he rite tonu te mura. Mena ka whakamahanatia ngā mea e rua mō ngā meneti tekau, ko tēhea wai i roto i te ipu he wera ake? Mena kua whakamahanahia e koe te wai, ka whakaae koe he wera ake te wai i roto i te wai iti (he nui ake te pāmahana whakamutunga o te wai, he nui ake rānei te huringa pāmahana). Kia rite ai te huringa pāmahana o te nui o te wai ki te iti o te wai, me whakanui ake te mura e whakamahana ana, he nui ake te wai.
Ko te nui o te wai e tohu ana i te papatipu o te wai (m). Ko te rahi o te mura e tohu ana i te nui o te wera. Ka taea te whakatau ko te nui o te wera (Q) he rite ki te huringa o te pāmahana o te mea. Ka nui ake te wai, ka nui ake te wera e hiahiatia ana hei whakaara ake i te pāmahana o te wai.
Te whanaungatanga i waenga i te wera (Q) me te momo mea ( c )
Ki te whakamahanahia e koe tētahi pae rino me tētahi pae karāhe he rite te rahi i te wā kotahi mā te whakamahi i te mura kotahi, ko tēhea ka tere ake te wera, ko te rino, ko te karāhe rānei? Ae, ka tere ake te wera o te rino. Ka taea te whakatau ko te wera e hiahiatia ana hei whakaara ake i te pāmahana o tētahi mea he rite ki te momo mea.
Ka honoa ngā whakataurite e toru i runga ake nei hei whārite:
Koinei te tātai, te whārite wera rānei.
Ngā Mōhiotanga: Q = wera (Joule), m = papatipu o te mea (kg), c = wera motuhake o te mea (J/kg Co), te rohe T = te huringa o te pāmahana (Co rānei K)
1. E rima kirokaramu o te hukapapa i te pāmahana o te -22 ° C ka whakamahanatia kia rewa katoa te hukapapa i te pāmahana o te 0 ° C. Mena ko te wera huna o te hukapapa he 333 kJ/kg, ā, ko te wera motuhake o te hukapapa he 2100 J/kg C o , ko te nui o te wera e hiahiatia ana ko...
A. 1496 kJ
B. 1596 kJ
C. 1696 kJ
D. 1796 kJ
E. 1896 kJ
Kōrero
E mōhiotia ana:
Taumaha o te huka (m) = 5 kg
Te pāmahana tīmatanga (T) = -22 ° C
Te wera huna o te hukapapa (L) = 333 kJ/kg = 333.000 J/kg
Te wera motuhake o te hukapapa (c) = 2100 J/kg C o
Pātai: Te nui o te wera e hiahiatia ana (Q)
Whakautu:
Tukanga 1: whakanuia te pāmahana o te hukapapa mai i te -22 ° C ki te 0 ° C
Q = mc ΔT = (5)(2100)(22) = 231.000 Joule
Tukanga 2: rewahia te hukapapa katoa ki roto i te wai
Q = m L = (5)(333.000) = 1.665.000 J
Te wera katoa = 231.000 J + 1.665.000 J = 1.896.000 J = 1.896 kJ
Ko te whakautu tika ko E.
Pūtake pātai:
Ngā Pātai Ahupūngao SBMPTN
