Second Law of Thermodynamics

By : Vikas Bhadoria

Updated : Feb 20, 2021, 23:23

The Second Law of Thermodynamics states that for an isolated system, the entropy will never decrease. It will remain constant only if the process is reversible. BYJU'S Exam Prep offers the Second Law of Thermodynamics GATE ME questions and answers pdf along with an in-depth understanding of concepts and tips/tricks to handle complicated problems for exams like JEE, NEET, GATE.

Important Second Law of Thermodynamics Topics

Topic	Explanation
Entropy	It is a measurement of the change that occurs in the system(from the previous state to the final state) Higher entropy would imply more randomness in the system.
Heat engine	It is a type of engine that converts heat energy into mechanical work.
Kelvin-Planck statement	Heat engine converts only a part of the heat energy to work, and the other part of it is transferred to the colder body.
Clausius statement	Heat can be transferred from a colder object to a hotter object only when an external source supplies its energy.
Thermal reservoir	The thermal reservoir is a system with a large capacity to store heat, and the temperature of such a system does not change with the addition or deletion of heat energy from them.

Tips to solve the Second Law of Thermodynamics Questions

Whenever you need to find the heat transferred from the higher thermal reservoir to the lower thermal reservoir, use the formula Qh=W+Qc
Change in entropy is calculated using the formula,

S=Q1T1+T0, where Q1 is the energy received from external source & T1 its temperature and T0 is the temperature for surroundings

Also, remember that the

Energy Efficiency Rating(EER) for Refrigerator=3.412(COP)r where (COP) r is the performance coefficient for Refrigerator
Similarly, EER for air conditioners is always between 8 and 11.

It would help if you were well-versed with the above formulas' derivations to tackle different types of problems related to the Second Law of Thermodynamics.
Solve It would help if you solved the Second Law of Thermodynamics MCQs given in different books on the topic.
You can also take the Second Law of Thermodynamics online quiz to monitor your speed and answers.
SolveIt would help if you also solved the Second Law of Thermodynamics GATE questions available on BYJU'S Exam Prep to enhance confidence in solving similar questions during exams.

Importance of the Second Law of Thermodynamics in GATE ME Exam

Second Law of Thermodynamics MCQ questions carries 5-7 marks of weightage in GATE exam papers.
The Second Law of Thermodynamics syllabus for GATE is easy to learn and can help improve your overall results of the exam.

The Second Law of Thermodynamics notes for GATE pdf will provide all the formulas that will help solve the numerical-based problems in lesser intervals, giving you sufficient time to solve other problems.
The questions asked to allow minor error chances, if any, as they are usually formula-based questions giving chances to score better.

Most Recommended Books for the Second Law of Thermodynamics for GATE

Book Name	Author
Thermodynamics-An Engineering Approach	Yunus A. Cengel & Michael A. Boles
Refrigeration & Airconditioning	C P Arora
Engineering Thermodynamics	P K Nag

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FAQs

Ques. Give an example to explain the Second Law of Thermodynamics?

For example, if we have a container that contains different particles of air that are mixed. Then it is not possible to separate those air particles without applying an external source. For more examples, you can refer to the Second Law of Thermodynamics notes for ME provided by BYJU'S Exam Prep.

Ques. Does life violate the second law of Thermodynamics?

The second thermodynamics law does not apply to open systems like living beings where energy and matter are continuously flowing outside and inside the system. For more information refer to the Second Law of Thermodynamics GATE notes offered by BYJU'S Exam Prep.

Ques. How can I improve my GATE scores?

It would help if you solved more and more Second Law of Thermodynamics GATE questions to improve your GATE exam performance and get better scores.

Ques. Is there any website that offers a Second Law of Thermodynamics online test?

BYJU'S Exam Prep offers the best Second Law of Thermodynamics books and GATE notes along with an online test.

Ques. Is it possible to learn the Second Law of Thermodynamics for Computer Science students?

Practice using the Second Law of Thermodynamics Quiz by BYJU'S Exam Prep will help you learn all the concepts and score astonishing results.