Nomenclature

Thermodynamic quantities : Superscripts :

cp

Specific isobaric heat capacity

o Ideal-gas part

cv

Specific isochoric heat capacity

r Residual part

f

Specific Helmholtz free energy

* Reducing quantity

g

Specific Gibbs free energy

/ Saturated liquid state

h

Specific enthalpy

„ Saturated vapor state

M

Molar mass

p

Pressure

Subscripts :

R

Specific gas constant

Rm

Molar gas constant

c Critical point

s

Specific entropy

max Maximum value

T

Absolute temperature a

RMS Root-mean-square value

u

Specific internal energy

s Saturation state

v

Specific volume

t Triple point

w

Speed of sound

tol Tolerance of a quantity

x

General quantity

ß

Transformed pressure, Eq. (29a)

Root-mean-square deviation:

7

Dimensionless Gibbs free energy, y = gl(RT)

Ô

Reduced density, S = pip**

h

Difference in any quantity

n

Reduced enthalpy, j = h i h*

where hx can be either absolute or

e

Reduced temperature, 6 = Ti T *

percentage difference between the

t

Transformed temperature, Eq. (29b)

corresponding quantities x ; N is

Reduced pressure, it = p i p*

the number of h x values.

P

Mass density

G

Reduced entropy, c = si s*

T

Inverse reduced temperature, t = T *i T

<

Dimensionless Helmholtz free energy, 0 = fi(RT)

a Note: T denotes absolute temperature on the International Temperature Scale of 1990.

a Note: T denotes absolute temperature on the International Temperature Scale of 1990.

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