Question

The value of entropy in the universe is:
A. Constant
B. Decreasing
C. Increasing
D. Zero

Answer 1

Hint: We know that the definition of the second law of thermodynamics is that all the spontaneous processes whether occur naturally or not are thermodynamically irreversible. These kinds of processes are brought about in the reverse direction by using some external agency.

Complete step by step answer:
We know that the amount of heat absorbed isothermally and infinitesimally slowly is divided by the absolute temperature at which the heat is absorbed is named as entropy change of the system or a process.
It is known that all naturally occurring processes are spontaneous and are accompanied by the effective rise in the entropy.
We can also explain this law in the terms of entropy. We know that all spontaneous processes are accompanied by the total increase of entropy that is for all the spontaneous processes the resultant entropy change is always positive.
Thus, we can conclude that the entropy of the universe increases continuously.
Thus, the correct option is C.

Note:
We also know that in the other manner second law states that without the help of an external agency a spontaneous process cannot be reversed. We can take the example as the heat cannot be flow by itself from a colder region to the hotter region.