Would an Eternal Universe Violate the Second Law of Thermo?

[g_mogni]

http://phys.org/news/2015-02-big-quantum-equation-universe.html

Some people claim that universe has existed for eternity to get around the Big Bang theory. However wouldn't this violate either the 1st of 2nd laws of Thermodynamics which forbid perpetual motion of the 1st and 2nd kind respectively? In other words, doesn't the impossibility of perpetual motion as stated by Thermodynamics make the notion of infinite or eternal amount of time absurd?

Cheers,

Gabriele

 

[Khashishi]

There's no violation if the entropy asymptotically approaches some value towards the infinite past.

 

[g_mogni]

There's no violation if the entropy asymptotically approaches some value towards the infinite past.

Do you mean if the entropy approaches infinity as t --> infinite? But is such a behaviour physical at all? I'm used to excluding asymptotes and singularities as unphysical solutions lol

http://www.askamathematician.com/2012/09/q-what-are-singularities-do-they-exist-in-nature/

 

[Khashishi]

Do you know what asymptote means?

 

[g_mogni]

Do you know what asymptote means?

Ye of course I've posted an example in the link above... maybe you meant that the asymptotycal value doe not have to be infinity?

 

[Khashishi]

Yes, asymptotic value does not have to be infinity.

 

[g_mogni]

Ye of course I've posted an example in the link above... maybe you meant that the asymptotycal value doe not have to be infinity?

Yes, asymptotic value does not have to be infinity.

But isn't what you're saying equivalent to the law of increase of entropy, that the entropy of an isolated system (e.g. universe) can only increase until it reaches max at equilibrium? This is basically a re-statement of the 2nd law...

G

 

[Khashishi]

I was only answering your initial question "However wouldn't this violate either the 1st of 2nd laws of Thermodynamics which forbid perpetual motion of the 1st and 2nd kind respectively?"
I don't know if the universe indeed is infinite in time or if entropy indeed asymptotes to a value. I am simply answering your question in the negative.