The primary objective of<unk>  is the establishment of a criterion for the determination of the feasibility or spontaneity of a given transformation. In this manner,<unk>  is typically used to predict the energy exchanges that occur in the following processes:
The following state functions are of primary concern in<unk> :
Internal energy (U)
Enthalpy (H).
Entropy (S)
Gibbs free energy (G)
Most identities in<unk>  arise from application of the first and second laws of<unk> , particularly the law of conservation of energy, to these state functions.
Chemical thermodynamics
Free energy
Gas constant
Potential energy
Gibbs free energy
Concentration
Bioenergetics
Saturation 