Electrochemistry | L-12 | Relation between Gibb's Free energy and Equilibrium Constant | #class12

Welcome to Varnwal Chemistry Education ????

In this lecture (Electrochemistry | L-12 | Relation between Gibb's Free energy and Equilibrium Constant | #class12


Electrochemistry | L-11 PDF Link https://drive.google.com/file/d/1m2PwBu0RV7ck5vrllYyTzmNZCSuK-hRG/view?usp=drive_link
???? Topics Covered:
✅ Nernst Equation Revision
✅ Calculation of Cell EMF
✅ Hydrogen Electrode Potential
✅ Effect of pH on Electrode Potential
✅ Numerical Problems for JEE & NEET
✅ Class 12 Board Exam Preparation

This lecture is useful for:
???? Class 12 CBSE/JAC/Bihar Board/UP Board Students
???? JEE Main & Advanced Aspirants
???? NEET 2026 Aspirants
????‍???? Faculty: D.K. Varnwal Sir
???? Titanium Batch 2026-27

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This lecture is part of the complete Electrochemistry Series for Class 12 Science students.

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#Electrochemistry #NernstEquation #EquilibriumConstant #Class12Chemistry #JEE2026 #NEET2026 #ChemistryLecture #DKVarnwal #PhysicalChemistry #BoardExamPreparation

This lecture is specially designed for students of:
???? JEE
???? NEET
???? CBSE
???? JAC Board
???? Bihar Board
???? UP Board
???? All State Boards of India

???? Batch: Titanium Batch 2026-27
???? Class: 12th Chemistry

???? “Zero to Hero in Chemistry” Series helps students learn Chemistry in the easiest and smartest way.

LEC-12 (49 MINUTES)

???? Topic: Electrochemical Cell and Gibbs Free Energy
????‍???? By: D.K. Varnwal Sir
⏱ Total Lecture Duration: 49 Minutes

00:00 – 01:30
Introduction of Lecture
• Welcome to Titanium Batch
• Importance of Gibbs Free Energy in Electrochemistry

01:30 – 06:00
Gibbs Free Energy (ΔG) – Basic Concept
• Definition of Gibbs Free Energy
• Why it is called useful energy
• Significance in chemical reactions

06:00 – 14:00
Derivation of ΔG = –nFEcell
• Electrical work done by galvanic cell
• Relation between charge and electrons
• Faraday constant (F)
• Complete derivation

14:00 – 18:00
Faraday Constant Calculation
• Charge on one electron
• Charge on one mole electrons
• Numerical derivation of F = 96500 C mol⁻¹

18:00 – 24:00
Standard Gibbs Energy & Cell Potential
• ΔG = –nFEcell
• ΔG° = –nFE°cell
• Conditions for spontaneity
• Sign convention

24:00 – 29:00
Intensive vs Extensive Properties
• Ecell as Intensive Property
• Gibbs Energy as Extensive Property
• Effect of multiplying chemical equation

29:00 – 33:00
Illustration:
Zn + Cu²⁺ → Zn²⁺ + Cu
• Calculation of ΔG
• Effect of doubling reaction

33:00 – 37:00
Question 1 (JEE/NEET Level)
Standard Gibbs Energy of Daniell Cell
⏱ Average Time: 4 Minutes

37:00 – 41:00
Question 2
Calculation of ΔG° and Equilibrium Constant
⏱ Average Time: 4 Minutes

41:00 – 43:00
Question 3
Concept-Based MCQ
⏱ Average Time: 2 Minutes

43:00 – 47:00
Question 4
Equilibrium Constant from Cell Potential
⏱ Average Time: 4 Minutes

47:00 – 48:30
Question 5
Advanced Practice Question
⏱ Average Time: 1.5 Minutes

48:30 – 49:00
Summary & Homework
• Key Formula Revision
• Important JEE/NEET Takeaways

━━━━━━━━━━━━━━━━━━
YOUTUBE SEARCH KEYWORDS
Electrochemical Cell and Gibbs Free Energy
Delta G and EMF Relation
ΔG = -nFE Derivation
Electrochemistry Class 12
JEE Electrochemistry
NEET Electrochemistry
Gibbs Free Energy Numericals
Electrochemical Cell Questions
Equilibrium Constant and EMF
Class 12 Chemistry Chapter 3
DK Varnwal Chemistry
Titanium Batch 2026
━━━━━━━━━━━━━━━━━━

TOTAL LECTURE TIME = 49 MINUTES
TOTAL QUESTIONS DISCUSSED = 5
AVERAGE TIME PER QUESTION ≈ 3–4 MINUTES




Nernst Equation, EMF of Cell, Electrochemistry Class 12, Hydrogen Electrode, Nernst Equation Numericals, Cell Potential Calculation, Electrochemistry JEE, Electrochemistry NEET, Class 12 Chemistry, Physical Chemistry, Electrochemical Cell, Standard Electrode Potential, Hydrogen Electrode Potential, pH and Electrode Potential, Chemistry by DK Varnwal, Titanium Batch 2026, JEE 2026 Chemistry, NEET 2026 Chemistry, Board Exam Chemistry, Constant from Nernst Equation
Nernst Equation Class 12
Electrochemistry Lecture 10
Relation between K and Ecell
Standard Electrode Potential
Electrochemistry JEE Main
Electrochemistry NEET
Class 12 Chemistry Chapter 3
Nernst Equation Derivation
Equilibrium Constant Electrochemistry
Electrochemistry One Shot
Physical Chemistry Class 12
D K Varnwal Chemistry


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