Question

what is technical importance of entropy?

Answer 1

It is deeply tied to the fundamental tenets of statistical mechanics and governs the behavior of many-body systems like solids, liquids, and gases.

Answer 2

Entropy tells us the direction of time. Entropy is ALWAYS increasing except in a a reversible process but that is impossible since reversible processes take infinite amount of time. SO ENTROPY IS ALWAYS INCREASING AND THIS FACT IS USED TO INDICATE THE DIRECTION OF TIME

Answer 3

in thermodynamics when heat is lost from a system to the universe, the universe gains entropy

a formula for change in entropy is S = Q/T
Q is the heat transfered and T is the temperature of the system .

for example say a house looses 24600J of heat over a certain period of time. In the house the temperature is 295K and outside it is 255K

the change in entropy of the universe = 24600/255 + (-24600)/295 (negative because heat is lost)

the change in entropy is 13.1J/K

Answer 4

Entropy does NOT always increase. Entropy in an isolated system always increases. The entropy in the universe always increases but it may decrease in one part while increasing more in another. If it always increased under any circumstance there would be no order in the universe.

Answer 5

Entropy is basically a measure of disorder. EVERYTHING in the universe tends towards disorder so it pertains to everything. Even the human brain is subject to entropy and actually works better the more disordered it is!

Entropy also tells us that there is an arrow of time that doesn't allow highly regular structure to form from a disordered system.

i.e If you dropped a glass and it smashed there's no rules in physics that don't allow the glass to completely reassemble itself in the fall, we know from experience that this doesn't happen and that is due to the fact that everything tends towards disorder.

Answer 6

@connor_ life doesnt ;)

Answer 7

thanks to all :)