大人 asked in 科學及數學化學 · 1 decade ago

order of reaction 既問題.高手請進

想問下"first order" 同 "second order 得一個reactant" 有咩分別..

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  • 1 decade ago
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    Reaction rate 是受 concentration of reactant 影響的,影響的程度不同,稱為 order of reaction。

    首先考慮只有一個 reactant 的 reaction: AB → A + B

    [AB] = concentration of AB

    若果 reaction rate is directly proportional to [AB], the reaction is first order.

    若果 reaction rate is directly proportional to [AB]2, the reaction is second order.

    再考慮有兩個 reactants 的reaction: C + D → product

    若果 reaction rate is directly proportional to [C], and directly proportional to [D]2.

    則 the reaction is first order with respect to C, and second order with respect to D.

    The reaction is overall third order (1 + 2 = 3).

    =

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