But measuring DSsys and DSsurr is inconvenient
to determine reaction spontaneity
More convenient to use parameters that apply only to the system!
The Gibbs free energy (G) accomplishes this goal, where
G = H - TS or DG = DH - TDS
G combines the system’s enthalpy and entropy; thus
G is a state function.
Where does the equation come from?
| Previous slide | Next slide | Back to first slide | View graphic version |