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JEE Main - Chemical Thermodynamics Notes (Free PDF Download)

Last updated date: 27th May 2024
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Download Chemical Thermodynamics Notes With Important Topics: Score High Marks In JEE Main 2025

Get ready to reach your success in JEE Main 2025 with Chemical Thermodynamics Notes that focus on important topics. These notes are your key to achieving high marks in JEE Main exams. These revision notes are made by master teachers at Vedantu, who know just what you need. These notes are in the compact form of  Chemical Thermodynamics and cover everything you should know about the exam. Best part? You can download them for FREE in PDF format.


JEE Main Revision Notes


Text, Images, Videos and PDF


JEE Main

Chapter Name:

Chemical Thermodynamics

Academic Session:



English Medium



Available Material:

Chapter-wise Notes with PDF

Students must consider Chemical Thermodynamics Notes PDF as a crucial resource because this chapter explains how energy changes occur during chemical processes. It covers concepts like heat, work, internal energy, enthalpy, and entropy, providing insights into the direction and spontaneity of reactions. 

You can understand the significance of Chemical Thermodynamics in JEE Main by checking the information in the table provided below.

Year Wise Weightage of Questions: JEE Main Chemical Thermodynamics

Sl. No.


Average No. Of Questions Asked

Marks per Question

Total Marks





















To achieve your goals, prepare for your JEE Main exam 2025 with Vedantu’s Chemical Thermodynamics Notes PDF and JEE Main Chemistry Syllabus 2025.

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JEE Main 2025: What to Focus in Chemical Thermodynamics?

A few topics in the Chemical Thermodynamics will help you score in JEE Main 2025. Knowing the list of those topics will make it easy for you to prepare and focus on the JEE Main exam.  You can check the list of important topics from the Chemical Thermodynamics below. Unravel the key concepts, fundamental theories, and vital formulas shaping your success in Chemical Thermodynamics for JEE Main 2025.

The important topics of Chemical thermodynamics for JEE Main are:

  • First Law of Thermodynamics

  • Enthalpy Changes

  • Hess's Law

  • Internal Energy

  • Second Law of Thermodynamics

  • Gibbs Free Energy

  • Entropy Changes

  • Thermochemical Equations

  • Standard Enthalpy and Entropy Changes

  • Spontaneity and Equilibrium

JEE Main Chemistry Notes: Explore Chapters with 2025 Links

Explore structured JEE 2025 Chemistry Notes through easily accessible chapter-wise links. Delve into crucial subjects, comprehend fundamental ideas, and enhance exam readiness. Equip yourself with an advantage using these targeted notes.

Why Chemical Thermodynamics Notes are Important in JEE Main Preparation? 

Chemical Thermodynamics focuses on energy changes during chemical reactions, revealing reaction direction, spontaneity, and equilibrium conditions. The weightage of Chemical Thermodynamics in JEE Main exam is around 6-8%. This means that there are typically 3-4 questions asked from this chapter. Expect direct questions from this part, making it a scoring section. Let's explore why this chapter holds such importance:

Thermodynamic Processes: Understanding the Basics

A solid foundation in thermodynamic processes is essential for grasping Chemical Thermodynamics. You must familiarize yourself with various types of processes, including isothermal, adiabatic, isobaric, and isochoric. Understanding the characteristics and application of each process will help you comprehend complex thermodynamic concepts.

First Law of Thermodynamics: Conservation of Energy

The First Law of Thermodynamics states that energy can neither be created nor destroyed, only transferred or converted from one form to another. In the context of Chemical Thermodynamics, this law emphasizes the conservation of energy during chemical reactions. You must comprehend the concept of internal energy and its relationship with heat and work to solve problems efficiently.

Second Law of Thermodynamics: Entropy and Spontaneity

The Second Law of Thermodynamics plays a crucial role in Chemical Thermodynamics. It introduces the concept of entropy, which measures the degree of disorder in a system. Understanding entropy is essential in determining the spontaneity of reactions. By comprehending this law, you can predict the direction in which a reaction will proceed.

Enthalpy, Gibbs Free Energy, and Chemical Equilibrium

Enthalpy and Gibbs free energy are significant concepts for determining the feasibility and spontaneity of chemical reactions. Enthalpy represents the heat absorbed or released during a reaction, while Gibbs free energy indicates the energy available to do useful work. Furthermore, grasping the concept of chemical equilibrium and its relation to Gibbs free energy will enhance your problem-solving skills in Chemical Thermodynamics.

Hess's Law and Calorimetry: Heat Transfer in Reactions

Hess's Law allows you to determine the enthalpy change of a reaction by utilizing known enthalpy changes of related reactions. Calorimetry, on the other hand, involves measuring the heat transfer during chemical reactions. Mastering these topics will enable you to calculate heat changes accurately and solve complex problems in Chemical Thermodynamics.

Temperature Dependence and Reaction Kinetics

Temperature plays a crucial role in both thermodynamic processes and reaction rates. Understanding how temperature influences reactions is essential for comprehending reaction kinetics. Activation energy, which determines the rate of chemical reactions, is closely related to temperature. By studying temperature dependence, you will gain insights into the factors that affect the speed of reactions.

JEE Main 2025 Chemical Thermodynamics: Notes vs Formulas

JEE Main formulas are like the building blocks of success in the exam, and when combined with well-structured revision notes, they become an indispensable tool for comprehensive understanding. As you revise your JEE Main notes, incorporate the associated formulas. Understand the 'why' behind the formula by referring to the notes, then apply it to practice problems. This integration sharpens your understanding, reinforces memory, and develops problem-solving skills—critical aspects of excelling in JEE Main 2025. Download the Important JEE Main Chemistry Formula PDF for free from Vedantu’s website and score more in your JEE Main 2025 Examinations.

Next-Level Preparation: Supplemental Links for JEE Main 2025 Chemical Thermodynamics

These extra resources will elevate your preparation for JEE Main 2025 Chemical Thermodynamics. These links go beyond the basics to provide more learning materials. They're like stepping stones to higher understanding. As you delve into these supplementary links, you'll explore deeper aspects of the chapter. This added knowledge can help you solve complex problems and tackle challenging questions. These links are your secret tools to boost your confidence and excel in your exam. Check out the links in the table below and make your JEE Main 2025 Chemical Thermodynamics preparation to the next level.

Other Important Links for JEE Main 2025

JEE Main Chemical Thermodynamics Important Questions

Score Higher by Using Vedantu’s JEE Main Notes for Preparation

On your path to success in exams, rely on Vedantu’s JEE Main Notes as your trustworthy partners. These notes make difficult topics easier, help you understand better, and prepare you thoroughly. With Vedantu's help, you can confidently tackle exams and find success. EmbraceThe benefits of JEE Main Notes – download them now to boost your preparation and achieve better exam results. The journey to excellence begins here, with Vedantu’s JEE Main Notes. Download the Free NotesToday and grasp your success!

FAQs on JEE Main - Chemical Thermodynamics Notes (Free PDF Download)

1. What are the most important topics included in Chemical Thermodynamics Notes for JEE Main 2025?

The key topics in Chemical Thermodynamics Notes for JEE Main 2025 include concepts like Enthalpy, Entropy, Gibbs Free Energy, Hess's Law, and Equilibrium.

2. What is the weightage of Chemical Thermodynamics Notes for JEE Main 2025?

Chemical Thermodynamics holds a significant weightage in JEE Main 2025 contributing to around 6-8% of the total marks.

3. Which is the easiest topic of JEE Main 2025 Chemical Thermodynamics Notes?

Enthalpy tends to be one of the more approachable topics in Chemical Thermodynamics due to its direct relation to heat changes in reactions.

4. What is the Chemical Thermodynamics in the context of JEE Main 2025?

Chemical Thermodynamics in JEE Main 2025 refers to the study of energy changes during chemical reactions, helping predict reaction outcomes, equilibrium conditions, and spontaneity.

5. How can I apply the Chemical Thermodynamics to solve JEE Main problems?

Applying Chemical Thermodynamics involves using concepts like Gibbs Free Energy to determine whether a reaction is spontaneous or non-spontaneous and predict reaction direction. It's key to solving energy-related problems.

6. Are there any common mistakes students make in Chemical Thermodynamics problems?

Students often confuse signs of enthalpy and entropy changes, leading to incorrect predictions about reaction spontaneity. Mixing up concepts like endothermic and exothermic reactions is also common.

7. Are there any online resources for additional practice with the Chemical Thermodynamics for JEE Main 2025?

Various online platforms offer practice questions, quizzes, and mock tests for Chemical Thermodynamics. Websites like Vedantu provide extra practice to reinforce your understanding.

8. How can I make my own JEE Main Chemical Thermodynamics notes?

To make your own JEE Main Chemical Thermodynamics notes, focus on summarizing key concepts, formulas, and important problem-solving techniques. Use diagrams, color-coding, and concise explanations for effective revision.