Question

What is the equation of entropy?

(a) Ratio of reversible transfer of heat to absolute temperature

(b) Ratio of absolute temperature to reversible heat transfer

(c) Ratio of adiabatic heat to macroscopic variables

(d) Ratio of macroscopic variables to adiabatic heat

This question was posed to me in homework.

My doubt stems from First Law of Thermodynamics topic in division Fluid Dynamics of Fluid Mechanics

Answer 1

Correct option is (a) Ratio of reversible transfer of heat to absolute temperature

The explanation is: This equation was defined by Rudolf Clausius, who defined entropy as a ratio of reversible heat transfer to that of its absolute temperature. This definition is also called the macroscopic definition of entropy.