Mechanical Engineering Exam  >  Mechanical Engineering Questions  >  Heat transfer takes place according toa)Zerot... Start Learning for Free
Heat transfer takes place according to
  • a)
    Zeroth Law of Thermodynamics
  • b)
    First Law of Thermodynamics
  • c)
    Second Law of Thermodynamics
  • d)
    Third Law of Thermodynamics.
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Heat transfer takes place according toa)Zeroth Law of Thermodynamicsb)...
Heat transfer takes place according to second law of thermodynamics as it tells about the direction and amount of heat flow that is possible between two reservoirs.
View all questions of this test
Most Upvoted Answer
Heat transfer takes place according toa)Zeroth Law of Thermodynamicsb)...
Explanation:

Heat transfer is the process of energy transfer from one body or system to another due to a temperature difference. It occurs in three modes: conduction, convection, and radiation. The Second Law of Thermodynamics governs the direction and efficiency of heat transfer.

Second Law of Thermodynamics:
The Second Law of Thermodynamics states that heat naturally flows from a higher temperature region to a lower temperature region. It also states that it is impossible to have a heat engine that operates with 100% efficiency. This law can be understood in terms of two main principles:

1. Kelvin-Planck Statement: It is impossible to construct a device that operates in a cycle and produces no other effect than the extraction of heat from a single reservoir and the performance of an equivalent amount of work.

2. Clausius Statement: It is impossible to construct a device that operates in a cycle and produces no other effect than the transfer of heat from a colder body to a hotter body.

Conduction, Convection, and Radiation:
1. Conduction: It is the transfer of heat through direct molecular interaction within a solid or between solids in contact. The rate of heat transfer by conduction is governed by Fourier's Law. It states that the rate of heat transfer is directly proportional to the temperature gradient and the cross-sectional area, and inversely proportional to the thickness of the material.

2. Convection: It is the transfer of heat by the movement of a fluid (liquid or gas) due to density differences caused by temperature variations. Convection can occur in two ways: natural convection (caused by buoyancy forces) and forced convection (caused by external forces such as fans or pumps).

3. Radiation: It is the transfer of heat through electromagnetic waves or photons. Unlike conduction and convection, radiation does not require a medium to transfer heat. All objects emit and absorb radiation, and the net heat transfer depends on the temperature and emissivity of the objects.

Conclusion:
Heat transfer occurs in accordance with the Second Law of Thermodynamics, which governs the direction and efficiency of heat flow. It is important for various engineering applications and plays a crucial role in understanding and designing systems involving energy transfer.
Attention Mechanical Engineering Students!
To make sure you are not studying endlessly, EduRev has designed Mechanical Engineering study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Mechanical Engineering.
Explore Courses for Mechanical Engineering exam

Top Courses for Mechanical Engineering

Heat transfer takes place according toa)Zeroth Law of Thermodynamicsb)First Law of Thermodynamicsc)Second Law of Thermodynamicsd)Third Law of Thermodynamics.Correct answer is option 'C'. Can you explain this answer?
Question Description
Heat transfer takes place according toa)Zeroth Law of Thermodynamicsb)First Law of Thermodynamicsc)Second Law of Thermodynamicsd)Third Law of Thermodynamics.Correct answer is option 'C'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Heat transfer takes place according toa)Zeroth Law of Thermodynamicsb)First Law of Thermodynamicsc)Second Law of Thermodynamicsd)Third Law of Thermodynamics.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Heat transfer takes place according toa)Zeroth Law of Thermodynamicsb)First Law of Thermodynamicsc)Second Law of Thermodynamicsd)Third Law of Thermodynamics.Correct answer is option 'C'. Can you explain this answer?.
Solutions for Heat transfer takes place according toa)Zeroth Law of Thermodynamicsb)First Law of Thermodynamicsc)Second Law of Thermodynamicsd)Third Law of Thermodynamics.Correct answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Mechanical Engineering. Download more important topics, notes, lectures and mock test series for Mechanical Engineering Exam by signing up for free.
Here you can find the meaning of Heat transfer takes place according toa)Zeroth Law of Thermodynamicsb)First Law of Thermodynamicsc)Second Law of Thermodynamicsd)Third Law of Thermodynamics.Correct answer is option 'C'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Heat transfer takes place according toa)Zeroth Law of Thermodynamicsb)First Law of Thermodynamicsc)Second Law of Thermodynamicsd)Third Law of Thermodynamics.Correct answer is option 'C'. Can you explain this answer?, a detailed solution for Heat transfer takes place according toa)Zeroth Law of Thermodynamicsb)First Law of Thermodynamicsc)Second Law of Thermodynamicsd)Third Law of Thermodynamics.Correct answer is option 'C'. Can you explain this answer? has been provided alongside types of Heat transfer takes place according toa)Zeroth Law of Thermodynamicsb)First Law of Thermodynamicsc)Second Law of Thermodynamicsd)Third Law of Thermodynamics.Correct answer is option 'C'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Heat transfer takes place according toa)Zeroth Law of Thermodynamicsb)First Law of Thermodynamicsc)Second Law of Thermodynamicsd)Third Law of Thermodynamics.Correct answer is option 'C'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
Explore Courses for Mechanical Engineering exam

Top Courses for Mechanical Engineering

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev