Oo絕情的我oO 發表於 12-4-2009 20:28:41

[chem] Activation energy"

what thermodynamic sign does Ea HAVE?


lap report唔識做-0-
高手們幫幫手

piyopiyo 發表於 12-4-2009 21:31:59

+
absorb energy ga ma

Oo絕情的我oO 發表於 12-4-2009 21:47:18

其實我唔明呢條野問緊咩-0-
究竟我要答d咩先中point呢???



淨係講 +ve, 講absorb energy?

j32738 發表於 14-4-2009 14:09:25

positive
coz energy is needed to break the bond in the reactant<<<覺得係咁

piyopiyo 發表於 14-4-2009 15:00:49

本帖最後由 piyopiyo 於 14-4-2009 20:24 編輯

how abt bond forming reaction -.-...
我覺得係
+
coz the reactants absorb energy to overcome the energy barrier for the reaction

[S]【YU】 發表於 16-4-2009 17:57:28

本帖最後由 【YU】 於 16-4-2009 18:01 編輯

piyopiyo 講緊乜 [] 點解我聽唔明....

4# 無錯
In partcular,energy係用黎打埋兩件本身排斥既野 ...nuclear fusion....

j32738 發表於 17-4-2009 18:10:10

piyopiyo 講緊乜 [] 點解我聽唔明....

4# 無錯
In partcular,energy係用黎打埋兩件本身排斥既野 ...nuclear fusion....
【YU】 發表於 16-4-2009 17:57 http://www.nakuz.com/bbs/images/common/back.gif
喔喔,琴日溫書睇番new way都係咁講
同埋係咪當energy needed to form bond in pdt 細過energy to break bond of reactant
咁delta H =-ve?

aildux 發表於 18-4-2009 15:25:35

7# j32738
好似系
題外話:我買咗new way第一本已經覺得好廢(簡直系毒藥)....即刻換咗C.C.Lee

Zend 發表於 18-4-2009 15:29:44

NewWay係好書
上年出Ｄ野ＮＥＷ　ＷＡＹ都有唔少，仲要係ＥＸＡＭＰＬＥ　ＱＵＥＳＴＩＯＮ　＝。＝

j32738 發表於 19-4-2009 18:13:28

NewWay係好書
上年出Ｄ野ＮＥＷ　ＷＡＹ都有唔少，仲要係ＥＸＡＭＰＬＥ　ＱＵＥＳＴＩＯＮ　＝。＝
Zend 發表於 18-4-2009 15:29 http://www.nakuz.com/bbs/images/common/back.gif
例如呢?
唔係幾知= =
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