熱力學第二定律><
2014-04-08 4:58 am
A 70kg log falls from a height of 25m into a lake .Suppose the log,the lake,and the air are all at 300K.What is the change in the entropy of the Universe for this process,assuming that all of the log's potential energy is coverted into heat?(95台聯大)
回答 (8)
2014-04-08 4:45 pm
✔ 最佳答案
A m=70kg log falls from a height of h=25m into a lake .Suppose the log,the lake,and the air are all at T=300K.What is the change in the entropy of the Universe for this process,assuming that all of the log's potential energy is coverted into heat?(95台聯大)Ans:Δs=Q/T=mgh/T=70*25*9.8/300=57.17(J/k)
2014-05-08 3:20 pm
2014-05-02 2:38 pm
2014-05-01 4:28 pm
2014-04-29 3:22 pm
2014-04-27 10:17 pm
2014-04-25 2:13 pm
2014-04-24 1:16 pm
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https://hk.answers.yahoo.com/question/index?qid=20140407000016KK05816