Answer 1:
Gibb's Free energy is one measure of the
energy that is available (measured at constant
temperature and pressure) to transform one
chemical compound to another, or one phase to
another (liquid to solid ...) or to perform a
chemical reaction. When you write a general
process of transformation:
A --- > B
>And if you perform the transformation at
constant temperature and pressure, and if the
product B has a smaller free energy than the
reactant A, the transformation can proceed on its
own (spontaneously).
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Answer 2:
The Gibbs Free Energy is a quantity that
represents the preferred energy state of a
reaction. The relative Gibbs Free Energies of
two states determines how much of each there will
be, and if one has a lower G.F.E. than the other,
it will be more common.
Thus, for instance, the carbon dioxide in a can
of soda has two possible states that it can be in:
in solution (dissolved), or as a gas (bubbles).
Under the pressure inside the can, the
conditions favor the carbon dioxide being in
solution. When you open the can, the GFE is much
lower for the carbon dioxide to be a gas, so it
fizzes out as bubbles. Gas is continually being
dissolved back into the soda just as gas is coming
out as bubbles, even in a glass of water. The
higher the GFE of dissolved gas relative to that
of gas, the lower will be the rate at which gas
dissolves and the faster the rate of which gas
will form bubbles. |
Answer 3:
In college chemistry I learned that Gibbs Free
Energy is the same as Free Energy, and we should
call it Gibbs Free Energy in the U.S. because
Gibbs was an American. Gibbs Free Energy is a
number that tells whether a chemical reaction or
process will occur and how stable the product(s)
will be, based on 2 other thermodynamic
properties - entropy and enthalpy - and
temperature.
Spontaneity appears to refer to whether
the reaction will occur or not. Some (most??)
reactions spontaneously go in one direction but
not the other.
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