Question

Which of the following option are related with the second law of thermodynamics (law of entropy)?

• A. The heat lost by one object must be gained by another object
• B. Heat flow naturally from a hotter body to a cooler body
• C. Celsius degrees and Kelvin degrees are equivalent
• D. Heat can be transformed into work
• E. The average kinetic energy of molecules is proportional to temperature

Answer 1

Answer: (B)

Heat flow naturally from a hotter body to a cooler body

The second law of thermodynamics says that heat flows 'naturally' from an object at a higher temperature to an object at a lower temperature, and heat doesn’t flow in the opposite direction of its own accord, since the entropy in such a process increases.

The reverse is not possible due to decrease in entropy in such a process.