In the Big Bang was entropy lower than now ?

Answer 1

Just to add a little bit ...

Total entropy in the universe increases continually, so in the past it must have been lower; in fact, during or just after the Big Bang it must have been incredibly low. But how could that be? What can account for it?

In inflationary cosmology, the notion is that the ultrabrief inflationary period at something like 10^(-32) sec into the BB when the Higgs field had an unstable nonzero equilibrium value, inflation stretched the nascent universe to an extremely high degree of smoothness at greater than light speed, driving total total entropy to near zero.

It wasn't exactly zero -- some nonuniform density wrinkles (asymmetries) remained, allowing nucleosynthesis to begin -- but it was near zero. And everything follows from that.

Answer 2

Because only one state was possible, entropy was 0 in Big Bang. But another thing is that only after ~10^-43 seconds (one Planck time) the laws of physics make sense. So if counting from that point, entropy would be greater than zero but still it would have minimum value, because entropy tend to increase over time.

Answer 3

Energy comes in two general kinds: useful and useless. Once the big bang got its foothold in our universe (1 Plank time ATBB), entropy (useless energy) began to appear out of the enthalpy (useful energy) following the Second Law of Thermodynamics. How energy behaved before 1 Plank time is anybody's guess because the laws of physics (including thermodynamics) for our universe were probably not yet established.

Increasing (positive) entropy simply means the universe is running down like a wind up watch will eventually run down...and pretty much for the same reason...the lack of useful energy. In the watch, once its spring has sprung, there is no more useful energy to drive the time piece. In the universe, once enthalpy has converted to entropy, there is no energy to drive the universe.

Don't get me wrong, enthalpy is being created locally all the time. A new star, for example, will be injecting useful energy into the universe. But, overall, the net effect throughout is that the universe is in fact running down. Entropy will eventually win out.

Answer 4

Good question..
First thought is yes and that the closer you get to the even,
the lower the entropy....
However...
During & immediately after the big bang, as energy was being
converted to matter, this involved a huge amount of entropy.

Answer 5

IN the Big Bang, the entropy was off the chart.

Answer 6

definately...the entropy of the universe is always increasing and for a action to take place the entropy of the first one should b lesser than the final one as per the second law of thermodymnamics

Answer 7

Yes, equations for entropy make it impossible for a closed enviornment to have less entropy after anything happens.
In short, everything increases entropy. everything.

Answer 8

Yeah, entropy's just not what it used to be.

Answer 9

do u really believe in Big Bang?