IUBio Biosequences .. Software .. Molbio soft .. Network News .. FTP

Thermo Dynamics

Ryan J. Werstuik sniper at telerama.com
Fri Sep 18 15:57:36 EST 1998


2nd Law of Thermodynamics:
And change in an isolated system causes the quantity of concerntrated,
usable energy to decrease, and entropy to increase.

    This means that any time energy is concerted from one form to another
(example, burning a sick) energy is lost to the environment, and cannot be
used.  The energy that was in the chemical structure of the stick is
converted into light (the flame) and heat.  In accordance with the first law
of thermodynamics, the amound of energy released, plus the small amount of
evergy left in the ash equal the amount of energy that was there to start
with. (Energy cannot be created or destroyed).  The word entropy means
disorginazation.  Closed systems, if left alone, would have a greater amount
of entropy, or disorginazation, as time passes.  An example of this would be
your house.  If someone didn't put energy into your house in the form of
cleaning it, it would get messier and messier.  The same, theoritically
works for the universe, which, for biological purposes is a closed system.
The amount of usable energy in the universe becomes less and less every
second, but the total amount of energy stays the same.  Also note that the
fact that the energy is not usable energy does not mean that we don't need
it.  The heat produced by your body in order to keep itself warm comes from
the unusable energy produced when ATP give off a phosphate and becomes ADP.

--Ryan Werstuik
clucas wrote in message <01BDE32D.09715E20 at cns174.cairnsnet.com.au>...
>Could somebody please explain what the second law of thermo dynamics is??
>Thanks
>Wendy





More information about the Cellbiol mailing list

Send comments to us at biosci-help [At] net.bio.net