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Nov 13 2024, 14:02:52, WedLogin ] [ Contact Forum Admin ] [ Main index ] [ Post a new message ] [ Search | Check update time | Archives: 12345678 ]
Subject: 試答


Author:
好仁
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Date Posted: 15:56:32 08/02/05 Tue
In reply to: Tatsuya Tanaka 's message, "無聊問題:水可以傳電,為何木不能" on 01:31:41 08/01/05 Mon

傳電 : flow of electrons

水能傳電:理論上,純正的水 (distillated pure water)只有極少量的離子(mobile ions),因此導電能力極低。

水濕不要按電制:因為手上的水不是純正的水,例如水喉水就有大量能夠導電的離子,使手上的水成為電解質(electrotyles),故可以傳電。

電壓高可以傳電:正如定義所說,傳電即是電子的流動。當電壓極高時,就能將物質離子化(ionized),從而釋出電子(free electrons),故能通電。打雷正是因為高電壓使空氣被離子化而導電的結果,所以理論上在極高電壓下,任何東西也可導電。

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Replies:
[> Subject: Re: 無聊問題:水可以傳電,為何木不能


Author:
hehe
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Date Posted: 23:45:10 08/03/05 Wed

TO六寸釘
好似唔係those compounds made up of metals and non-metals
就係electrolyte喎e.g. ethanoic acid
those compounds made up of metals and non-metals 唔係叫ionic compound咩?

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[> [> Subject: Re: 無聊問題:水可以傳電,為何木不能


Author:
Kampfer
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Date Posted: 00:11:15 08/04/05 Thu

>TO六寸釘
>好似唔係those compounds made up of metals and
>non-metals
>就係electrolyte喎e.g. ethanoic acid
>those compounds made up of metals and non-metals
>唔係叫ionic compound咩?
ionic compound溶左落solvent就會變ions
ions咪就係用來傳電囉

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