What is entropy? entropy actually means that a development direction entropy of nature is equal to k × ln (Ω)
This k is called the Boltzmann constant Boltzmann constant is 1.38×10^-23 J/K
This Ω will become larger and larger, so the entropy will become larger and larger. Ω is becoming larger in the natural development direction, so the entropy is also larger. That is to say, in an isolated system, the entropy is not reduced. This is called entropy. There is a controversial topic in increasing the theoretical entropy increase theory. Maxwell proposed a theory. He said that the entropy of the universe is upper bound because the second law of thermodynamics or the entropy increase theory causes the entropy of the universe to become larger and larger when the entropy of the universe After reaching infinity, then the development of the universe is over or the universe is dead, so the universe will die someday. He has named this thing as hot silence. When the heat is reached, the universe is Game Over. Some scientists believe that because the upper limit of the entropy of the universe is expanding, the entropy of the universe will never reach the upper limit. The universe can continue for a long time. This is a more optimistic view. Maxwell proposed this point after the scientific community. The controversy is very big, who knows? Anyway, this matter is more similar to a philosophical theory.