In chapter 4 of Chemistry Class 12, students will learn more about Chemical Kinetics. It refers to the rate of a chemical reaction, factors influencing the rate, integrated rate equations, and pseudo-first-order reaction. Also, the chapter presents the collision theory of chemical reactions, the temperature dependence of the reaction rate, etc. with examples. But, it needs to be noted that this chapter 4 is not an easy lesson of chemistry. Class 12 chemistry chapter 4 also have their own set of conceptual theories and numerical problems.
Chemical Kinetics is the branch of chemistry. It is dealing with the rate of a chemical reaction and the factors affecting the mechanism of the reaction. Based on this rate of reaction, we have Instantaneous reactions, slow reactions, and moderately slow reactions. The chemical reaction completing in less than 1ps time is referred to as a fast reaction. Similarly, the chemical reaction happening for some minutes to some years is termed as the slow reaction. Moderately slow reactions are intermediate chemical reactions, which occur between fast and slow chemical reactions.
Different types of chemical reactions are always happening all around us. We can understand these for helping us in various applications. Students will understand concepts about the feasibility of the reaction, the extent of reaction, and hence the rate of the reaction. The feasibility of a chemical reaction are explained using thermodynamics in easy terms. Also, the student will determine the extent of the chemical reaction using chemical equilibrium.
The study of chemical kinetics will help to understand the chemical reactions hence finding the solutions to various problems. In finding solutions and answers to various practical questions, the study of the rate of reaction plays a significant role. In this chapter, the focus will be on the study of the average and instantaneous rate of reaction and the related factors.
Some subtopics of Chemical Kinetics are Rate of a Chemical Reaction, Factors Influencing Rate of a Reaction, Dependence of Rate on Concentration, Rate Expression and Rate Constant, Order of a Reaction, Molecularity of a Reaction, Integrated Rate Equations, Zero Order Reactions, First Order Reactions, Half-Life of a Reaction, Pseudo First Order Reaction, Temperature Dependence of the Rate of a Reaction, Effect of Catalyst and Collision Theory of Chemical Reactions.
The student will study the rate of chemical reaction which is the change in concentration of the reactant (or product) in the unit time. They will study various factors influencing the rate of a reaction such as a temperature, nature of reactant, surface area, catalyst, etc.
The concept of rate expression and Rate Constant will help students a lot. Order of a Reaction and Molecularity of the Reaction will enhance the understanding of the students about the rate of reaction. Integrated Rate Equations like Zero Order Reactions, First Order Reactions, and Half-Life of a Reaction are some important segments of this chapter.
Temperature Dependence of the Rate of a Reaction is another fundamental section. The effect of Catalyst and the concept of catalysis is very helpful to change the rate of chemical equations. At last Collision Theory of Chemical Reactions will help to make a strong base of chemical