Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning - Discussion


The heat transfer takes place according to

[A]. Zeroth law of thermodynamics
[B]. First law of thermodynamics
[C]. Second law of thermodynamics
[D]. Kirchhoff's law

Answer: Option C


No answer description available for this question.

Avijit said: (May 5, 2015)  
I think first law of thermodynamics,

Q = U+W but for heat transfer W=0.

Gajadhar Rajak said: (May 24, 2015)  
The answer will be (A) zeroth law of thermodynamics.

Ranveer Singh said: (Jul 14, 2015)  
Answer is C because according to 2nd law it is impossible to transfer heat from low temp reservoir to high i.e. heat transfer is from high to low.

Sangram said: (Aug 6, 2015)  
Answer C is right.

Sangram said: (Aug 6, 2015)  
Because zeroth is for thermal equilibrium.

Lal said: (Nov 24, 2015)  
0th law tells about thermal equilibrium.

1st law conservation of all energy not heat transfer.

2nd law makes possible heat flow by giving direction.

Pranay said: (May 14, 2016)  
Second law talks about the direction constraints in energy transaction or in any natural and synthetic processes.

Eg: grey hair can not turn black, but the reverse is true.

- source nptel

kelvin plank and Clausius statements tell us same.

Prashant said: (Jun 1, 2016)  
Heat transfer takes place from higher to lower temperature according to the second law of thermodynamics.

Dhruvi said: (Dec 16, 2016)  
Yes, right @Prashant.

Biren said: (Aug 30, 2017)  
Heat transfer takes place according to higher to lower so its second is 100% right here.

Sethuramalingam said: (Jun 19, 2018)  
Since, the second law (kelvin and claussius statement) deals with the heat transfer.

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