order of reaction 既問題.高手請進

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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