Standard state

From Freepedia

In chemistry, the standard state of a material is its state at 1 bar (100 kilopascals) (the standard state of a material can be defined at any given temperature). When the standard state is referred to in a chemical reaction, it also includes the condition that all solutions are at 1 mol/L or 1 mol/kg.

For a given material or substance, the standard state is the reference state for the material's thermodynamic state properties such as enthalpy, entropy, Gibbs free energy, and for a lot of other material standards.

See also

• Standard temperature and pressure aka STP

External links

• IUPAC definition of standard state
• Standard-state enthalpies