Symbols Used to Denote a Chemical Reaction, Process or Condition

Explanation of symbols used as subscripts or superscripts to tell more about the type of chemical reaction, process or condition

See also Thermodynamic Terms, Functions and Relations

             Symbols used as subscripts
Symbol Process
ads adsorption
at atomization
c combustion reaction
dil dilution (of a solution)
dpl displacement
f formation reaction
fus melting, fusion (solid → liquid)
imm immersion
mix mixing of fluids
r reaction in general
sol solution (of solute in solvent)
sub sublimation (solid → gas)
trs transition (between two phases)
vap vaporization, evaporation (liquid → gas)
             Symbols used as superscripts
Symbol Process
app apparent
≠, ‡ activated complex, transition state
E excess quantity
id ideal
infinite dilution
* pure substance
°, θ standard

Examples of use could be:

ΔGr : Change in Gibbs free energy by (a given) reaction,

ΔHsol : Change in enthalpy by (a given) solution

ΔSvap : Change in entropy by (a given) evaporation

pθ : Pressure at standard state (normally 1 bar)

Related Topics

  • Basics - The SI-system, unit converters, physical constants, drawing scales and more
  • Miscellaneous - Engineering related topics like Beaufort Wind Scale, CE-marking, drawing standards and more
  • Thermodynamics - Effects of work, heat and energy on systems

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