JEE Main 2023 Thermodynamics Revision Notes - PDF Download
What is Thermodynamics?
Thermodynamics is a branch of Physics, which deals with the processes that involve heat transfer, work, and internal energy. Thermodynamics deals with the macroscopic states of matter.
Joule studied the relationship of heat and its nature, and association to mechanical work.
Thermal Equilibrium states that there are the same temperatures for systems.
Internal Energy = Kinetic energy + potential energy of the constituents.
The thermodynamic system has equilibrium states shown by state variables.
The particular state determines the state variable’s value, and not the path. Its examples include Temperature and pressure.
Zeroth law of thermodynamics: When two systems are in equilibrium with a given third system, it is necessary that they must be in thermal equilibrium with each other.
The thermodynamics first law is based on conservation of energy.
Efficiency of heat engine= Ratio of work done by engine to input.
The system as well as the environment comes back to the initial phase in a reversible process.
The processes of nature cannot be reversed. The reversible process is a quasi static process that has no factors. This is a very slow process where the system is in equilibrium both thermal and mechanical with its environment.
The device that does a cyclic process that converts heat to work is known as heat engine.
A reversible engine operates between two temperatures called Carnot engine, consisting of two processes connected by two adiabatic processes.
Working substance of an engine does not determine the carnot engine’s efficiency, temperatures do.
The efficiency of the Carnot engine is 𝜂 = 1 − TC/TH = 1 − (Temperature of cold reservoir/Temperature of the hot reservoir).
The efficiency of a Carnot engine is more than that of an engine.
When one cold body gains heat, another loses it.
The flow of heat from cooler surroundings can result in hotter bodies.
Kelvin's statement of second law states that there is no heat engine that converts with 100% efficiency.
Clausius' statement states that no process can be done when the only result is conversion of heat to work.
Thermodynamics is a crucial chapter because 3-4 questions with a weightage of 12-16% are expected to come from it in the JEE Main 2023. Keep reading to get a brief of the important topics covered in Thermodynamics.
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FAQs on JEE Main 2023 Thermodynamics Revision Notes
1. Is Any Question Repeated in the JEE Main 2023 Exam?
Yes, the questions can be similar, but it is not very likely that you will get the same question in the JEE Main question paper as that from the previous year's question papers. Solve the previous year question paper to stay updated with the trends of the question being asked in the exam. Always remember to do a careful study of the pattern of the previous year paper, and understand the marking scheme and course structure and prepare according to that.
2. Can I Access the JEE Main 2023 Papers from Vedantu?
Yes, you can access the JEE Main papers. All you need to do is, just visit our website, i.e Vedantu and there will be a link for accessing these papers. You can access them anytime at your convenience. You can also download the Vedantu application so that these papers are easily accessible on all your devices. It enables you to study from these papers with better ease so that you are always one step ahead.
3. What Are the Advantages of Practicing Previous Year Question Papers from Vedantu?
With more practice with our previous year question papers, the JEE Main exam pattern and the marking scheme become crystal clear. Also, by referring to the previous year question paper of the JEE Main, a candidate gathers a good idea of the important topics and the weightage of the topics covered in the syllabus. One very crucial advantage of solving our papers is that there are a variety of questions that help the students identify their weak spots so that they can work on them.
4. Will the JEE Main 2023 Question Papers Release After the Exam?
Yes. NTA will release the question papers after the commencement of all the shifts of the JEE Main exam, i.e., after 6th September 2020.
Students can download the JEE Main Question papers from the official website and verify their solutions with the answer key that is released along with the question paper itself to have a rough idea and estimate of their respective scores in the JEE examinations. All students must necessarily do this for determining their future plans.
5. What is the importance of the chapter Thermodynamics for JEE Main 2023?
Thermodynamics refers to the field of Physics which covers the processes that involve the transfer of heat, work as well as international energy. The chapter also deals with the first law of thermodynamics and its different applications. It is a significant chapter as it has a total weightage of 12-16% for JEE Main 2023. Therefore, every student needs to gain proper concept clarity and answer all the questions correctly. To ensure this, revision notes, as well as previous year question papers, can be solved by the students.