Preferred Label : standard state;
IUPAC definition : State of a system chosen as standard for reference by convention. Three standard states
are recognized: For a gas phase it is the (hypothetical) state of the pure substance
in the gaseous phase at the standard pressure p p , assuming ideal behaviour. For
a pure phase, or a mixture, or a solvent in the liquid or solid state it is the state
of the pure substance in the liquid or solid phase at the standard pressure p p
. For a solute in solution it is the (hypothetical) state of solute at the standard
molality m , standard pressure p or standard concentration c and exhibiting infinitely
dilute solution behaviour. For a pure substance the concept of standard state applies
to the substance in a well defined state of aggregation at a well defined but arbitrarily
chosen standard pressure.;
Origin ID : S05925;
Automatic exact mappings (from CISMeF team)
- See also
State of a system chosen as standard for reference by convention. Three standard states
are recognized: For a gas phase it is the (hypothetical) state of the pure substance
in the gaseous phase at the standard pressure p p , assuming ideal behaviour. For
a pure phase, or a mixture, or a solvent in the liquid or solid state it is the state
of the pure substance in the liquid or solid phase at the standard pressure p p
. For a solute in solution it is the (hypothetical) state of solute at the standard
molality m , standard pressure p or standard concentration c and exhibiting infinitely
dilute solution behaviour. For a pure substance the concept of standard state applies
to the substance in a well defined state of aggregation at a well defined but arbitrarily
chosen standard pressure.
