Te wera motuhake

Ko te wera motuhake (c) te nui wera (Q) e hiahiatia ana hei whakaara te pāmahana (T) kotahi waeine o te papatipu (m) o tētahi mea mā te kotahi nekehanga. Tātai c:

Pūnaha Wāhanga ā-Ao ko J/Kg K.

Te wera motuhake Ka rerekē te uara o tētahi mea i te pāmahana. Mēnā kāore i te nui rawa te huringa pāmahana, ka taea te kī he pumau te uara. Ko ngā uara e whai ake nei ko te c mō ētahi mea i te pēhanga o te 1 atm me te pāmahana o te 20 ^oC (i whiwhi mā te whakamātautau).

Ko te wera motuhake o tētahi mea e tohu ana i tōna kaha ki te mimiti, ki te tuku rānei i te wera. Ko te teitei ake o te wera motuhake, ko te iti ake o te kaha o te mea ki te mimiti, ki te tuku rānei i te wera. Ko te iti iho o te wera motuhake, ko te pai ake o te kaha o te mea ki te mimiti, ki te tuku rānei i te wera. He iti ake te wera motuhake o te koura, nō reira ka tere ake te mimiti, te tuku rānei i te wera. I tetahi atu taha, he nui ake te wera motuhake o te wai, nō reira ka puhoi ake te mimiti, te tuku rānei i te wera.

Tauira raruraru

1. Ko te wera e hiahiatia ana hei whakaara ake i te pāmahana o te 1 kg o tētahi wai he c 300 J/Kg.K mai i te 20^oKa huri a C hei 30^oKo C te….
Kōrero
E mōhiotia ana :
I pātaihia : wera (Q)
Whakautu :
Tātai wera :
Ko ngā kaora e hiahiatia ana ko:
Q = (1)(300)(10)
Q = 3000 Joule

2. Ka whakamahanahia he wai he 2 kg te taumaha mai i te pāmahana 20^oKa huri a C hei 80^oC, e hiahiatia ana te wera 6 × 10⁵ Joule. Ko te wera motuhake o te wai ko…
Kōrero
E mōhiotia ana :
I pātaihia : vs.
Whakautu :
Tātai:
Nui c:
c = 600.000 / (2)(60) = 600.000 / 120
c = 5000 J/Kg. K