Chemical Kinetics Lecture Notes

Vocabulary flashcards covering the fundamental concepts, factors, and calculations of chemical kinetics based on the lecture transcript.

Chemical Kinetics

An aspect of Chemistry that deals with the rate or speed of a reaction.

Collision frequency

The frequency at which particles collide; an increase in this frequency leads to an increase in the reaction rate.

Surface Area

A factor affecting the rate of reaction; an increase in the surface area of the particle causes an increase in the rate.

Concentration of reactants

A factor affecting the rate of reaction; an increase in concentration leads to an increase in the rate.

Temperature

A factor affecting the rate of reaction; higher temperature results in a higher rate.

Catalyst

Agents that alter (speed up or reduce) the rate of a reaction.

Rate formula

Calculated as $Rate = \frac{Concentration}{time}$.

Units of Rate

The units for the rate of reaction, expressed as $M/s$ (Molar per second).

$$[A]_0$$

The initial concentration of reactant A, given as $1.0\,M$ in the example.

$$[A]_{20}$$

The concentration of reactant A after $20\,s$, which is $0.54\,M$ in the example.

Average rate for A

The calculated rate of disappearance for reactant A over $20\,s$, determined to be $2.3 \times 10^{-2}\,M/s$.

Rate of disappearance of $H_2$

Expressed mathematically as $-\frac{\Delta [H_2]}{\Delta t}$.

Rate of appearance of $HCl$

Based on the reaction $H_2 + Cl_2 \rightarrow 2HCl$, it is expressed as $\frac{\Delta [HCl]}{2 \Delta t}$.