F.3 Physics 問題

2006-12-27 2:58 am
點解熱比容量同傳熱快慢冇關??熱比容量大應該傳熱慢ga wo, 因為object 要內D 先熱.
Is that true?

水要蒸發就要gain energy,過程中令particles kinetic energy raise 定直接去break down particles之間既吸引力??
如果先令particles kinetic energy raise 咁水的temperature 咪會升lor??

回答 (2)

2006-12-27 3:06 am
✔ 最佳答案
heat係一種energy而唔係溫度
呢個concept要記得好清楚
係...雖然如果熱比容大會令佢的溫度升得慢d
但佢吸收同放出的能量--heat,係唔變ge
所以, specific heat capacity大只會影響佢升溫的溫度而不是屬energy的geat

當水蒸發時,其實係會吸比潛熱係唔係?
溫度係measure ke的你講得冇錯
不過係佢蒸發時...其實溫度係唔變ga!
原因就係吸的所有能量都會比佢break down particles的吸引力
KE係唔會增加ge
直至到佢蒸發曬,再gain的energy就會係加係KE令佢加溫度lak
參考: 自己
2006-12-27 3:23 am
熱比容量同傳熱快慢冇關. 熱比容量large means the object need more energy to change the temperature. When it was small, the object can change the temperature (T) more easily.

However, 傳熱 fast or slow is due to many factors. e.g. T difference between 2 objects.


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