3 Nā laʻana o nā nīnau ma ke kānāwai mua o ka thermodynamics
1. Hoʻohui ʻia he 3000 Joules o ka wela i kahi ʻōnaehana, a hana ka ʻōnaehana i 2500 Joules o ka hana ma ke kaiapuni. ʻO ka loli o ka ikehu kūloko o ka ʻōnaehana…
Pahana
Ua ʻike ʻia :
Wela (Q) = +3000 Joules
Hana (W) = +2500 Joules
Ua nīnau ʻia : nā loli i ka ikehu kūloko
Pane :
Ke Kānāwai Mua o ka Thermodynamics :
Nā lula hōʻailona :
He maikaʻi ʻo Q inā hoʻohui ʻia ka wela i ka ʻōnaehana.
He maikaʻi ʻo W inā hana ka ʻōnaehana ma nā wahi a puni
He maikaʻi ʻole ʻo Q inā hoʻokuʻu ʻia ka wela e ka ʻōnaehana
He maikaʻi ʻole ʻo W inā hana nā mea a puni ma ka ʻōnaehana
Nā loli ikehu i loko o ka ʻōnaehana:
Piʻi ka ikehu i loko o ka ʻōnaehana ma 500 Joules.
2. Hoʻohui ʻia he 2000 Joules o ka wela i kahi ʻōnaehana a hana nā mea a puni i 2500 Joules o ka hana ma ka ʻōnaehana. ʻO ka loli o ka ikehu kūloko o ka ʻōnaehana…
Pahana
Ua ʻike ʻia :
Wela (Q) = +2000 Joules
Hana (W) = -2500 Joules
Ua nīnau ʻia : nā loli o ka ikehu i loko o ka ʻōnaehana
Pane :
Piʻi ka ikehu i loko o ka ʻōnaehana ma 4500 Joules.
3. Hoʻokuʻu ʻia he 2000 Joules o ka wela mai ka ʻōnaehana, a hana nā mea a puni i 3000 Joules o ka hana ma ka ʻōnaehana. ʻO ka loli o ka ikehu kūloko o ka ʻōnaehana…
Pahana
Ua ʻike ʻia :
Wela (Q) = -2000 Joules
Hana (W) = -3000 Joules
Ua nīnau ʻia : nā loli o ka ikehu i loko o ka ʻōnaehana
Pane :
Piʻi ka ikehu i loko o ka ʻōnaehana ma 1000 Joules.
Hopena:
– Inā omo ka ʻōnaehana i ka wela mai ke kaiapuni, piʻi aʻe ka ikehu i loko o ka ʻōnaehana.
– Inā hoʻokuʻu ka ʻōnaehana i ka wela i ke kaiapuni, e emi ana ka ikehu i loko o ka ʻōnaehana.
– Inā hana ka ʻōnaehana ma ke kaiapuni, e emi ana ka ikehu i loko o ka ʻōnaehana.
– Inā hana ke kaiapuni ma ka ʻōnaehana, e piʻi aʻe ka ikehu i loko o ka ʻōnaehana.
