Please read carefully: The second law of thermodynamics has a number of equivale

Question

Please read carefully:

The second law of thermodynamics has a number of equivalent definitions. All of which give an indication of which way nature flows ( in a time fashion). which of these statements is not generally derivable from the concept that a particular engine is themosst efficient engine possible AND that it is reversible?

a. heat will not flow spontaneously from a cold reservir to hot reservoir
b. an engine or combination of engines alone cant make heat flow from a cold reservoir to a hot one.
c. heat will flow spontaneously from a cold reservoir to hot one.
d. it is not possible to convert 100 % of heat into work.

Explanation / Answer

The answer is ' d ' Because total heat given to a system is used to work done by the system and also useful to increase the internal energy of the system. So it is not possible to convert 100% of heat energy into work.

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