Question

Entropy occurs due to _______

(a) Change in macroscopic variables

(b) Volumetric changes only

(c) Mass changes only

(d) Temperature only

This question was addressed to me in my homework.

I would like to ask this question from First Law of Thermodynamics in chapter Fluid Dynamics of Fluid Mechanics

Answer 1

Right choice is (a) Change in macroscopic variables

Easy explanation: Entropy is related to a number of microscopic configurations. It can have some of the most specified macroscopic variables. These macroscopic variables undergo changes, which lead to a disorder or randomness.