Thermodynamics Test Questions

Q.  According to Clausis statement of second law of thermodynamics___________________?

a. heat can’t be transferred from low temperature source to high temperature source
b. heat can be transferred for low temperature to high temperature source by using refrigeration cycle
c. heat can be transferred from low temperature to high temperature source if COP of process is more than unity
d. heat can’t be transferred from low temperature to high temperature source without the aid of external energy
e. all of the above


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