Standard state - Definition and Overview

In chemistry, the standard state of a material is its state at 1 standard atmosphere (101.325 kilopascals) and 25 degrees Celsius (298.15 kelvins). 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.

The standard state is the reference state for enthalpy and a lot of material standards.

See also : Standard temperature and pressure aka STP

External links

• Standard-state enthalpies (http://www.nyu.edu/classes/tuckerman/honors.chem/lectures/lecture_15/node9.html)