Factors affecting Reaction Rate

影響反應速率的因素

29-3-2011

-Brainstorming Time-

How does a reaction successfully happen?

一個化學反應怎樣成功發生？

Collision Theory碰撞理論

For a chemical reaction to occur, the reactant particles must collide with each other. It is so-called effective collision.一個化學反應需要發生，反應物粒子必須互相碰撞。這被稱之為有效碰撞。

1. Right Orientation方位正確

2. High kinetic energy enough足夠高的動能

Collision Theory碰撞理論

反應物粒子互相靠近

有效碰撞

無效碰撞

没有發生反應

產生生成物

+

A BA B

AABB

B

B

A

A

AABB

AA BB

Collision Theory碰撞理論

Therefore only small fraction of particles can produce effective collision.

因此只有少數粒子能產生有效碰撞。

Catalysts in biological systems生物體系上的催化劑

Enzyme involved in the browning of fruits

導致水果褐變的酶 Enzyme in humans 人體內的酶 Enzyme in yeast

酵母內的酶