Questions:
A 3-kg metal block is heated to100度 and the put into a 5-kg water bath. The temperature of the water bath rises from 27度 to 31.7度. What are the specific heat capacity and heat capacity of the metal block?
(Specific heat capacity of water=4200)
The answers:
Specific heat cpacity:482
Heat capacity:1450
我想知點可以計出482和1450
我想要整個過程
Thank you very much ^^
Physics高手請進
2012-11-25 2:44 am
回答 (2)
2012-11-25 3:11 am
✔ 最佳答案
Specific heat cpacity:mc△T=mc△T3xC(100-31.7)=5X4200X(31.7-27)
C=482(corr.to 3.sig.fig.)
mc△T=E
5X4200X(31.7-27)=E
E=98700
Heat capacity:c△T=E
C(100-31.7)=98700
C=1450 (corr.to 3.sig.fig.)
2012-11-25 3:15 am
Let the specific heat capacity of the metal block be x
mcΔT =mcΔT
(3)(x)(100-31.7)=(5)(4200)(31.7-27)
204.9x=98700
x=482J kg^-1℃^ -1
Applying C=mc , we have
C=3(482)
=1446
=1450J℃^-1 (corr.to 3 sig. fig.)
mcΔT =mcΔT
(3)(x)(100-31.7)=(5)(4200)(31.7-27)
204.9x=98700
x=482J kg^-1℃^ -1
Applying C=mc , we have
C=3(482)
=1446
=1450J℃^-1 (corr.to 3 sig. fig.)
收錄日期: 2021-04-29 19:39:21
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