单词 HELMHOLTZ FUNCTION的词源
Named after Baron Hermann Ludwig Ferdinand von Helmholtz (1821–94), German physiologist, physicist, and mathematician.
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Therefore, in a finite reversible isothermal process the total work done on the
system by the surroundings is equal to the increase in the Helmholtz function of
the system. Conversely, when the system does work on the surroundings in a ...
Michael Thomas Sprackling, 1991
2
Thermodynamics: Concepts and Applications
We will revisit this property later in this chapter in the discussion of ideal-gas
mixtures; in Chapter 6 this property is prominent in the discussion of chemical
equilibrium. Helmholtz Free Energy or Helmholtz Function The Helmholtz free
energy, ...
3
Advanced Thermodynamics Engineering, Second Edition
Furthermore, since daT : P dvT, (7.23') the reversible isothermal work or area
under an isotherm on a P-v diagram represents the Helmholtz function. The work
transfer during an isothermal process results in a change in the Helmholtz
function.
Kalyan Annamalai, Ishwar K. Puri, Milind A. Jog, 2011
where Cg and G, are values of the Gibbs function for saturated gas and saturated
liquid, respectively. For the region (tk — r)<0.5°C an exact solution for the
Helmholtz function subject to Eqs. (A.7) yields values of density for the saturated
liquid ...
5
Energy and Finite Element Methods in Structural Mechanics
Let us now consider another function used in thermodynamics called the
Helmholtz function, F, defined as a specific value in the following way: F = u - Ts
Since u, T, and s are point functions, F must be a point function. Now consider a ...
Irving Herman Shames, Clive L. Dym, 1995
6
The Bases of Chemical Thermodynamics
5.3.1 Generalities 68 5.3.2 Internal Energy 69 5.3.3 Enthalpy 70 5.3.4 Helmholtz
Function (Helmholtz Energy, Free Energy) 70 5.3.5 Gibbs Function (Gibbs
Energy, Free Enthalpy) 71 5.3.6 Chemical Potential. Summary 72 5.4 Maxwell's ...
Michael Grätzel, Pierre Infelta, 2000
7
An introduction to thermodynamics
The work delivered is less than the decrease in the Helmholtz function, if there is
any irreversibility present in the process. Since the decrease in the Helmholtz
function represents the potential to do work by the system, it is also a ...
8
Physical Chemistry An Advanced Treatise
The Helmholtz function F of a heterogeneous or of a continuous system (volume
V) is given by F E E F“ (heterogeneous system), (15.2) F E JVFdV (continuous
system). (15.3) Here, dV denotes a volume element and F is the local density of
the ...
9
Core Engineering Concepts for Students and Professionals
HELMHOLTZ FUNCTION: a AND A The Helmholtz function is defined for a pure
substance by Eq. 22.37 through Eq. 22.39.13 22.37 22.38 22.39 Like the Gibbs
function, the Helmholtz function is used in investigating equilibrium conditions.
10
The Entropy Principle: Thermodynamics for the Unsatisfied
In addition to internal energy and enthalpy, there are at least two other important
fundamental thermodynamic functions, namely the Helmholtz function, also
called free energy, and the Gibbs function, also called free enthalpy. Why do we
have ...
