Chemical Kinetics

Rate law: Given:

For a first-order reaction: Let the initial amount be , and three-fourths decomposed means So: Given , so:

(a) Rate law: (b) - Molecularity = 2 (Sucrose + H O) - Order = 1 (depends only on sucrose concentration) (c) These are called **pseudo-first-order reactions** because one reactant (water) is in large excess and treated as constant.

According to the Arrhenius equation: where: - : rate constant - : activation energy - : gas constant - : temperature in Kelvin When temperature increases, increases, hence increases.
Also, more molecules have energy , so the rate of reaction increases.