Adsorption and Catalysis
Telangana Open School (TOSS) · Class 12 · Chemistry
Summary of Adsorption and Catalysis for Telangana Open School (TOSS) Class 12 Chemistry. Key concepts, important points, and chapter overview.
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Overview
The surface of solids plays a vital role in many chemical processes. When molecules of a gas or a dissolved substance come into contact with a solid surface, they may get attracted and retained on it. This phenomenon is called adsorption. Similarly, certain substances can speed up chemical reactions
Key Concepts
Adsorption is the process in
Adsorption is the process in which molecules of a gas or solute are attracted and retained on the surface of a solid. The substance being adsorbed is
Physical adsorption occurs due to weak
Physical adsorption occurs due to weak van der Waals forces and is reversible, multilayered, and occurs at low temperatures. Chemisorption involves st
Freundlich isotherm describes adsorption mathematically as
Freundlich isotherm describes adsorption mathematically as x/m = k/p^n, valid at moderate pressures. Langmuir isotherm assumes monolayer adsorption an
A catalyst increases the rate
A catalyst increases the rate of a chemical reaction without being consumed. It works by lowering the activation energy through an alternative reactio
In homogeneous catalysis
In homogeneous catalysis, the catalyst is in the same phase as the reactants (e.g., H⁺ in solution). In heterogeneous catalysis, the catalyst is in a
Learning Objectives
- Define adsorption and distinguish between physical and chemical adsorption
- Explain the factors affecting adsorption
- Understand Freundlich and Langmuir adsorption isotherms
- Define catalysis and differentiate between homogeneous and heterogeneous catalysis
- Explain how catalysts affect activation energy
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