What is Zero Order Model?
The zero order model is a type of mathematical model that assumes that the rate of a reaction does not change with the concentration of a reactant. This type of model is used to describe the relationship between the concentration of a reactant and the rate of reaction. It is also known as the “rate law” or “zero order kinetics.”
Applications of Zero Order Model
The zero order model is used to describe reactions that proceed at a constant rate, regardless of the concentration of the reactants. Examples of reactions that follow the zero order model include:
- Chemical reactions involving enzymes or catalysts, such as the reaction of hydrogen peroxide with catalase.
- Chemical reactions involving the release of a gas, such as the decomposition of ozone.
- Chemical reactions involving the formation of a solid, such as the precipitation of a metal from its aqueous solution.
- Chemical reactions involving the formation of a complex compound, such as the formation of a metal complex.
Zero Order Model Equation
The rate of a zero order reaction is given by the following equation:
Rate = k x [A]0
Where k is the rate constant and [A] is the concentration of the reactant.
Conclusion
The zero order model is a useful tool for describing reactions that proceed at a constant rate, regardless of the concentration of the reactants. It is used to describe a variety of chemical reactions including those that involve enzymes or catalysts, the release of a gas, the formation of a solid, or the formation of a complex compound. The rate of a zero order reaction is given by the equation Rate = k x [A]0, where k is the rate constant and [A] is the concentration of the reactant.
References
- Khurana, V. (2020). Zero Order Kinetics. Encyclopædia Britannica.
- Brown, T. L., LeMay, H. E., Bursten, B. E., & Murphy, C. J. (2020). Chemistry: The Central Science (14th ed.). Pearson.
- University of Utah. (2020). Zero Order Reactions. Chemwiki.