snow
7 years ago by mcw (63)
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让人想起高中课程了
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哈哈有教過熵嗎？
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还是教过的，不过这个后来学物理学算法都得重提一遍
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哈哈看到物理學的計算我就要放棄了XD
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原来还有这么有趣的，盐会产生离子，微粒之间的运动就增加，运动增加的话， 就需要更多的热量变化才能改变原来 的状态。
那我在想，在烧水的时候，烧纯净的水和，烧盐水（汤）相比，会不会盐水的沸点也低一些呢？
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哈哈你學習得很快呢XDD 還記得一開始學這些課題還會在腦海中有跟你類似的問號XD
不過這個情況有一點點不同，因為由冰轉化到水的的時候，冰是固態，分子整齊排列，一點也不亂
轉化到水的時候，水中的分子已經能自由移動，由此亂度的轉變很大
由液體到氣體其實亂到的差別(比例上)沒有太大差別，亂度都是很高，由此對沸點的影響有限～
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明白了。固定的分子排列是整齐不乱的，但液体的分子已经是自由移动，明白了。下一期还是食物吗？
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哈哈學得真快😜
下期不是食物啦，但還在想題目 XD
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期待！
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那我平时想做肉等食物的时候，想快点解冻，我就在上面撒点盐就行了，这个话题超级的实用呀！
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哈哈小心把肉醃成咸肉 😂😂
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最后再用水洗一洗哈哈，不然做肉的也总是要放盐的哈哈
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一直觉得熵这个概念比较抽象，希望有量化的公式表达离子类型的影响、浓度的影响
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對啊，其實這個課題真的挺抽象的
但在這裡說公式應該會把人嚇壞😂😂
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I generally find entropy fascinating (see here for instance), so it's nice to know how it applies to melting street snow!
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