當水轉成蒸氣時，下列何者是正確?
(1) 其溫度必為100oC。
(2) 其分子的平均動能不變。
(3) 外界所提供之熱力被轉成水的內能。
A. 只有 (1)
B. 只有 (3)
C. 只有 (1) 和 (2)
D. 只有 (2) 和 (3)
E. (1), (2) 和 (3)
物理mc@!!!!!!!!!!!!!!!!!!!!!!!!!!!
2007-04-23 7:26 am
回答 (3)
2007-04-24 2:27 am
✔ 最佳答案
(1) 你的衣服洗後晾乾,即是水轉成蒸氣,顯然不必100度. (1)錯(2) 衣服晾乾的過程,溫度不會變,水沸騰時溫度一直保持100度.故分子動能不變. (2)對
(3) 外界提供之能量轉成水分子之勢能(克服表面張力及分子之間的引力做功). (3)對
故為 D
2007-04-23 11:33 am
我會答 D 蒸發 可以系低於100度進行
2007-04-23 7:52 am
E.
When water reaches 100C,it boils.All the provided energy is use to increase the internal energy(potential energy) of the H20 molecules when converting to steam.
The energy transferred is regarded as latent heat.
So,E.
When water reaches 100C,it boils.All the provided energy is use to increase the internal energy(potential energy) of the H20 molecules when converting to steam.
The energy transferred is regarded as latent heat.
So,E.
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