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[化學/物理問題]氫鍵和范德華力如何影響水/冰的比熱容?

本帖最後由 samsam 於 2012-6-9 14:44 編輯

上堂時忽然發現這個問題
遺憾的是老師說不太清楚
所以上來求救

冰的比熱容:2050 J/kg K
水的比熱容:4200 J/kg K
水蒸氣的比熱容: 1850 J/kg K
===============================
還有
溫度會不會影響比熱容?

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水在固態和液態時  
之間的氫鍵比氣態時的多
所以固態和液態的比熱容比氣態高
(估計)水的液態的密度比固態高
                可能是比熱容不同的原因吧
                這我想不到-     -SORRY

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回復 5# bigjjsmall


    問題在於
為何固體、液體、氣體的為何不一樣?

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分子之間氫鍵和范德華力越強   
就要用越多能量來破壞他們之間的氫鍵和范德華力
由此 氫鍵和范德華力越強  比熱容也應該高些吧
我估計的=    =

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回復 1# samsam


    溫度是不會影響比熱容的每種物質的每種狀態都有固定的比熱容,
當然,非晶體要另當別論了。
明明昭晔烨

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比熱容量是指:把每一千克的物質的溫度提高一度所要的能量  

我所知溫度是不會影響比熱容量的   這應該是物質本來的一個數值

可能在高壓下會不同

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比熱容量是指:把每一千克的物質的溫度提高一度所要的能量  

我所知溫度是不會影響比熱容量的   這應該是物質本來的一個數值

可能在高壓下會不同

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