Standard Reaction
What is Standard Reaction?
A standard reaction refers to a chemical reaction carried out under standard conditions — typically 298 K (25°C), 1 bar pressure, and unit activity (1 M for dissolved species). Thermodynamic quantities such as ΔG°, ΔH°, ΔS°, and standard electrode potential E° are defined for standard reactions and serve as reference values. Standard reaction data are tabulated and used with the relationship ΔG° = −nFE° = −RT ln K to calculate equilibrium constants and predict spontaneity.
Key Facts
Frequently Asked Questions
A standard reaction refers to a chemical reaction carried out under standard conditions — typically 298 K (25°C), 1 bar pressure, and unit activity (1 M for dissolved species). Thermodynamic quantities such as ΔG°, ΔH°, ΔS°, and standard electrode potential E° are defined for standard reactions and serve as reference values. Standard reaction data are tabulated and used with the relationship ΔG° = −nFE° = −RT ln K to calculate equilibrium constants and predict spontaneity.