太陽的核融合

[浩]

化學反應???唔係物理咩??it don't involve the electrons??

據我所知, 核聚變要high energy去overcome 質子斥力, 但最後所放出能量應較所須能量(temperture, pressure)多, 故才有核聚變發電o既概念
咁算唔算放熱??

小弟識得唔多, 請各位包涵

[Wah!]

化學反應???唔係物理咩??

我是說化學老師對於鐵,多以"原子"形容, 少用"分子", 不是指聚變為化學反應

[johnsonlee]

No, surely not! Don't be silly! I ask and answer by myself? How come?

等我地扮下自問自答啦~~


幾好玩咁

好就由你開始先!

[johnsonlee]

how to explain this?

You mean which one?

[扒飯撈麵]

化學反應???唔係物理咩??

我是說化學老師對於鐵,多以"原子"形容, 少用"分子", 不是指聚變為化學反應

When using "molecule", we are talking about the compound (especially involve covalent compound) most of the time.
Actually using "atom" to describe the substances inside a star may not be suitable also, as all matter are present in plasma state. And we are just talking about the nucleus of the element as Ho said, electron do not take part in these reactions.

As the posts said before, not all核聚變 reactions are exothermic. It depends on the reactant(s) and product(s).

To Ho,
Just finished mock?

To ~Sun~/johnsonlee,
I have tried to use more than one name in few places, as I don』t want the forum is full of my name.
Don』t know Wah! remember another name of me or not :p

[johnsonlee]

I think talking to his own by using different accounts means nothing, but a waste of time. Ng, I don't kown, it's fun, yep, maybe,
Don』t know Wah! is your name, but I haven't seen it before !!!

[Wah!]

"Wah!" is the only name I use in forum.

[WinsonCMK]

ooo~ths a lot~

鐵有分子的嗎@o@~據我所知分子應該是只有微弱的Van Dar Waal's force互相連繫著的,但鐵應該沒有分子形式嚕@o@

[Wah!]

石墨晶體薄片每層之間的引力才是範德華引力.
分子不是範德華引力構成,而是共價鍵或離子鍵的引力構成.
共價鍵又可以構成單獨的分子(例如氧氣 O2),或者巨型共價結構(例如鑽石).

金屬的應該是金屬鍵.

[浩]

actually, i ask chemicial or physical becoz it seems the previous posts seem mixing them together?
not saying Wah! sorry~

Mock?~~finished~~

em.......i've forget tht not all核聚變 reactions are exothermic, but it is for hydrogen. Actually I've read an article on Newton about the nuclear fusion and it say recent the experiments proved nuclear fusion plant work and can give energy more than the input energy~ if it finally became mature, we can enjoy clean and cheap energy~

In addition to Wah!, the force exists between the inter-molecules also is wan der waals force, right?

[Wah!]

中六中七物理會提到結合能,會簡單利用結合能的概念來說明聚變和裂變何時會吸收或放出能量.

[扒飯撈麵]

1.我不是指Wah!有多過一個名,我係指Wah!可能知道我在某些地方(都是天文相關的)的另一個名

2.要弄清楚構成分子的力和分子與分子之間的力
如果你讀理科的話,不弄清楚會學得唔好,仲失唔少分

3.金屬(或其離子)形成的分子
是非常重要的

4.呢個世界咁多cd-rom
只要留言的內容有意思
自言自語又有乜所謂呢

[Wah!]

3.金屬(或其離子)形成的分子

你的意思是有金屬分子? 中學化學老師無提過呢..

[浩]

金屬.......應該係離子??
我估扒飯指緊 product ionic bond with part of covalent characteristic?

[扒飯撈麵]

都可以咁講既
不過更多的是complex/complex ions(例如鏡神鍍鏡用的 Ag complex ion)/organicmetallic(有機物+金屬,唔知中文譯名) compound(例如血紅蛋白,葉綠素等....係咪好重要呢)

don't miss the dative bond, which is included in AL chem