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Explanation of symbols used as subscripts or superscripts to tell more about the type of chemical reaction, process or condition.
Thermodynamic Terms, Functions and Relations
Symbols Used to Denote Chemical Reactions or Process Conditions
Subscript Symbol Process
dilution (of a solution)
melting, fusion (solid → liquid)
mixing of fluids
reaction in general
solution (of solute in solvent)
sublimation (solid → gas)
transition (between two phases)
vaporization, evaporation (liquid → gas)
activated complex, transition state
Examples of use could be:
r : Change in Gibbs free energy by (a given) reaction,
sol : Change in enthalpy by (a given) solution
vap : Change in entropy by (a given) evaporation
θ : Pressure at standard state (normally 1 bar)
The SI-system, unit converters, physical constants, drawing scales and more.
Engineering related topics like Beaufort Wind Scale, CE-marking, drawing standards and more.
Work, heat and energy systems.
The First Law of Thermodynamics simply states that energy can be neither created nor destroyed (conservation of energy). Thus power generation processes and energy sources actually involve conversion of energy from one form to another, rather than creation of energy from nothing.
Entropy and disorder.
Apothecaries' fluid and weight system with ounces, drachms, grains, scruples and more.
A principal system of units.
Prefix names used for multiples and submultiples units.
Physical and chemical dimensionless quantities - Reynolds number, Euler, Nusselt, and Prandtl number - and many more.
Imperial (USCS) and SI dimensions and units terminology in fluid mechanics.
The Greek alphabet is essential expressing formulas and in technical language.
An introduction to the SI metric system.
Common thermodynamic terms and functions - potential energy, kinetic energy, thermal or internal energy, chemical energy, nuclear energy and more.
Common converting units for Acceleration, Area, Density, Energy, Energy per unit mass, Force, Heat flow rate, Heat flux, Heat generation per unit volume and many more.
An overview of the United States Customary System Units - Imperial Units.
Definition and examples of calculation of weighted average bed temperature in adiabatic reactors.
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