<P> In thermodynamics , the Gibbs free energy ( IUPAC recommended name : Gibbs energy or Gibbs function ; also known as free enthalpy to distinguish it from Helmholtz free energy ) is a thermodynamic potential that can be used to calculate the maximum of reversible work that may be performed by a thermodynamic system at a constant temperature and pressure ( isothermal , isobaric ) . The Gibbs free energy ( ΔGo = ΔHo - TΔSo ) ( J in SI units ) is the maximum amount of non-expansion work that can be extracted from a thermodynamically closed system ( one that can exchange heat and work with its surroundings , but not matter ) ; this maximum can be attained only in a completely reversible process . When a system transforms reversibly from an initial state to a final state , the decrease in Gibbs free energy equals the work done by the system to its surroundings , minus the work of the pressure forces . </P>
<P> In thermodynamics , the Gibbs free energy ( IUPAC recommended name : Gibbs energy or Gibbs function ; also known as free enthalpy to distinguish it from Helmholtz free energy ) is a thermodynamic potential that can be used to calculate the maximum of reversible work that may be performed by a thermodynamic system at a constant temperature and pressure ( isothermal , isobaric ) . The Gibbs free energy ( ΔGo = ΔHo - TΔSo ) ( J in SI units ) is the maximum amount of non-expansion work that can be extracted from a thermodynamically closed system ( one that can exchange heat and work with its surroundings , but not matter ) ; this maximum can be attained only in a completely reversible process . When a system transforms reversibly from an initial state to a final state , the decrease in Gibbs free energy equals the work done by the system to its surroundings , minus the work of the pressure forces . </P>
what are the units of delta g reaction
what are the units of delta g reaction
J in SI units
J in SI units