In equations, the following formula:

is called, in Hmolpedia namesake, the Lewis inequality for a natural process and states that the difference of the Gibbs free energy, symbol "G", of an isothermic-isobaric system in its final state

the symbol "Δ", the Greek capital letter Delta, being the thermodynamics symbol for a large change (in contrast with a small differential change, symbol "d" or "δ" (delta), for an exact differential change, or (d-hat) or đ (d-crossbar), for an inexact differential change), the symbol "<" being the less than inequality mathematical symbol. [1] A synonymous name of this equation is the: Gibbs free energy change for a

History

This equation was first stated by American physical chemist Gilbert Lewis in 1923, based on the 1876 work of American engineer Willard Gibbs, which in turn is based on the 1856 Clausius inequality, developed by German physicist Rudolf Clausius, which in turn is based on the the principle of

References

1. Guggenheim, Edward, A. (1933).

2. Lewis, Gilbert N. and Randall, Merle. (1923).

is called, in Hmolpedia namesake, the Lewis inequality for a natural process and states that the difference of the Gibbs free energy, symbol "G", of an isothermic-isobaric system in its final state

*G**f*less the Gibbs free energy of the system in its initial state*Gi*, is less than zero, where ΔG is equal to:the symbol "Δ", the Greek capital letter Delta, being the thermodynamics symbol for a large change (in contrast with a small differential change, symbol "d" or "δ" (delta), for an exact differential change, or (d-hat) or đ (d-crossbar), for an inexact differential change), the symbol "<" being the less than inequality mathematical symbol. [1] A synonymous name of this equation is the: Gibbs free energy change for a

__spontaneous__process.History

This equation was first stated by American physical chemist Gilbert Lewis in 1923, based on the 1876 work of American engineer Willard Gibbs, which in turn is based on the 1856 Clausius inequality, developed by German physicist Rudolf Clausius, which in turn is based on the the principle of

__Carnot efficiency__, developed in 1824 by French physicist Sadi Carnot.References

1. Guggenheim, Edward, A. (1933).

*Modern Thermodynamics by the Methods of Willard Gibbs*(pg. 17)*.*London: Methuen & Co.2. Lewis, Gilbert N. and Randall, Merle. (1923).

*Thermodynamics and the Free Energy of Chemical Substances*(pgs. 160-61)*.*McGraw-Hill Book Co., Inc.