Venkateshwari
Online
Skills :
About :
Venkateshwari focuses on making Chemistry easy to understand through structured online sessions. The teaching style emphasizes clear explanations, especially in Organic Chemistry a…
Venkateshwari focuses on making Chemistry easy to understand through structured online sessions. The teaching style emphasizes clear explanations, especially in Organic Chemistry and Class 12 Chemistry topics. Concepts are broken down into simple steps to help students build strong fundamentals. Regular practice and guided problem-solving are used to improve accuracy and confidence. The learning sessions are conducted in English, ensuring smooth communication and better comprehension. Students receive continuous support to clear doubts and strengthen exam preparation. The approach is designed to help learners develop clarity, consistency, and interest in Chemistry over time.
Venkateshwari
Online
Skills :
Venkateshwari focuses on making Chemistry easy to understand through structured online sessions. The teaching style emphasizes clear explanations, especially in Organic Chemistry a...
Venkateshwari focuses on making Chemistry easy to understand through structured online sessions. The teaching style emphasizes clear explanations, especially in Organic Chemistry and Class 12 Chemistry topics. Concepts are broken down into simple steps to help students build strong fundamentals. Regular practice and guided problem-solving are used to improve accuracy and confidence. The learning sessions are conducted in English, ensuring smooth communication and better comprehension. Students receive continuous support to clear doubts and strengthen exam preparation. The approach is designed to help learners develop clarity, consistency, and interest in Chemistry over time.
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Courses by Venkateshwari
Online
2 Hour
English
Chennai, 3/252, theradi street
On Call
Weekday
Chemistry Course Content for Class 12 – Chemical Kinetics:
Chemical Kinetics
Introduction
Chemical kinetics is the branch of chemistry that deals with the study of the rate of chemical reactions and the factors affecting them. It helps us understand how fast reactants are converted into products.
Learning Outcomes
Students will be able to:
Define the rate of a chemical reaction.
Explain factors affecting reaction rates.
Understand rate law and rate constant.
Differentiate between reaction order and molecularity.
Analyze zero-order and first-order reactions.
Explain collision theory and activation energy.
Key Concepts
1. Rate of a Chemical Reaction
The change in concentration of reactants or products per unit time.
Rate = Change in concentration / Time
Unit: mol L⁻¹ s⁻¹
2. Factors Affecting Reaction Rate
Nature of reactants
Concentration of reactants
Temperature
Surface area
Pressure (for gases)
Presence of catalysts
3. Rate Law
The rate of a reaction is proportional to the concentration of reactants raised to suitable powers.
Rate = k[A]ᵐ[B]ⁿ
Where:
k = Rate constant
m, n = Orders with respect to reactants
4. Order of Reaction
The sum of the powers of concentration terms in the rate law.
Example: Rate = k[A]²[B]
Order = 2 + 1 = 3
5. Molecularity
The number of reacting species taking part in an elementary reaction.
Types:
Unimolecular
Bimolecular
Termolecular
6. Integrated Rate Equations
Zero-Order Reaction
Rate = k
Characteristics:
Rate is independent of concentration.
Concentration decreases linearly with time.
First-Order Reaction
Rate = k[A]
Characteristics:
Rate depends on concentration.
Half-life is constant.
7. Half-Life Period (t½)
Time required for the concentration of a reactant to become half of its initial value.
8. Temperature Dependence of Rate
As temperature increases, reaction rate increases due to more effective collisions.
9. Arrhenius Equation
Relates rate constant with temperature and activation energy.
10. Collision Theory
Chemical reactions occur when reactant particles collide with:
Sufficient energy
Proper orientation
11. Activation Energy
Minimum energy required for reactants to undergo a successful reaction.
12. Catalysts
Substances that alter the rate of a reaction without being consumed.
Functions:
Lower activation energy
Increase reaction rate
Applications of Chemical Kinetics
Food preservation
Industrial chemical production
Drug manufacturing
Environmental chemistry
Corrosion control
Quick Recap
✔ Rate of reaction
✔ Factors affecting rate
✔ Rate law and rate constant
✔ Order and molecularity
✔ Zero-order and first-order reactions
✔ Half-life period
✔ Arrhenius equation
✔ Activation energy
✔ Collision theory
✔ Catalysis
HOTS Question
Why does refrigerated food spoil more slowly than food kept at room temperature?
Answer: Lower temperature decreases the kinetic energy of molecules, reducing the frequency of effective collisions and slowing down the rate of spoilage reactions.