Question

"Heat cannot flow itself from a body at lower temperature to a body at high temperature" is a statement or consequence of which law of thermodynamics? Does the working of refrigerator violets this law? Justify

Answer 1

Heat cannot flow from a cold body to a hot body without the performance of work by some external agency.

 

This statement comes naturally from the second law of thermodynamics. Heat can only flow from the body at lower temperature to a body at higher temperautre when we do work on the body.

Answer 2

Heat cannot flow itself from the body at lower temperature to other  body at high temperature" is a statement of second law of thermodynamics.

• According to second law of thermodynamics Without some external agency performing work, heat can not flow from a cold body to a hot body.
• The statement comes from the second thermodynamics law, of course. Only when we work on the body will heat transfer from the body at lower temperature to a body at higher temperature.