Extensive Variables

V	Abbrev.	Unit	Descript.	Domain	Suffix
V	V	m3	Volume	System	M, W, V, R
	V(ph)1			Phase	M, W, F, R
	VP(ph) 2			Phase	M, W, V, R
G	G	J	Gibbs energy	System	M, W, V, R
	G(ph) 1			Phase	M, W, V, F, R
A	A	J	Helmholtz energy	System	M, W, V, R
	A(ph) 1			Phase	M, W, V, F, R
U	U	J	Internal energy	System	M, W, V, R
	U(ph) 1			Phase	M, W, V, F, R
H	H	J	Enthalpy6	System	M, W, V, R
	H(ph)			Phase	M, W, V, F
S	S	J/K	Entropy6	System	M, W, V, R
	S(ph) 1			Phase	M, W, V, F, R
Cp	HM.T3	J/mol/K	Heat capacity at constant pressure	System	R
	HM(ph).T3			Phase	R
Cv	UM.T4	J/mol/K	Heat capacity at constant volume	System	R
	UM(ph).T4			Phase	R
D	DG(ph) 5	N/A	Driving force (thermodynamic factor)	Phase	Always use with M, W, V or F. R can also be used.
1 For this variable, if the phase is unstable, then the variable gets a value of zero. 2 Do not use VP(ph) as a condition in POLY. Instead, use CHANGE_STATUS PHASE <PHASE>=FIX <AMOUNT> where the fixed <AMOUNT> is roughly equal to VPF(ph), which cannot be directly evaluated or listed. If the phase is unstable, then VP(ph) and its normalized quantities get zero value. 3 Use only if pressure has been set as a condition. 4 Use only if volume has been set as a condition. 5 Already divided by RT. 6 When working in the POST module you can also enter the abbreviation for this variable into the Console, for example, enth or enthalpy, which corresponds to HM, and entr and entropy, which corresponds to SM.

These are for the overall amount of components in whole system, or amount of a component in system or in a phase.

Do not use NP(ph) or BP(ph) as conditions in the POLY module. Instead use CHANGE_STATUS PHASE <PHASE>=FIX <AMOUNT> where the fixed <AMOUNT> is roughly equal to NPF(ph) or BPF(ph), which cannot be directly evaluated or listed. If the phase is unstable, then NP(ph) or BP(ph) (and its normalized quantities) get zero value.

When plotting the following quantities in POST, refer to each as indicated:

• X(comp) -> Mole-Fraction <comp> (or M_F)
• W(comp) -> Weight-Fraction <comp> (or W_F)
• X%(comp) -> Mole-Percent <comp> (or M_P)
• W%(comp) -> Weight-Percent <comp> (or W_P).
• u-f(ph,comp) -> U-F

V	Abbrev.	Unit	Descript.	Domain	Suffix	Comment
n	N	mole	Moles	All components	M, W, V, (R)
	N(comp)			Component	M, W, V, (R)
	N(ph,comp)			Component in a phase	M, W, V, (R)
	NP(ph)1			Phase	M, W, V, (R)	See above
b	B	gram	Mass	All components	M, W, V, (R)
	B(comp)			Component	M, W, V, (R)
	B(ph,comp)			Component in a phase	M, W, V, (R)
	BP(ph) 1			Phase	M, W, V, (R)	See above
x	X(comp)	N/A	Mole fraction	Component	(R)	See above
	X(ph,comp)			Component in a phase	(R)
w	W(comp)	N/A	Mass (weight) fraction	Component	(R)	See above
	W(ph,comp)			Component in a phase	(R)
x%	X%(comp)2	N/A	Mole percent	Component	(R)	See above
w%	W%(comp)2	N/A	Mass (weight) percent	Component	(R)	See above
u	u-f (ph,comp)1	N/A	u-fraction	Component in a stable phase	(R)	See above
in	IN(sp)2	mole	Input mole number	Phase species in the system	(R)	See above
im	IM(sp)2	gram	Input mass unit	Phase species in the system	(R)	See above
1 Do not use as a condition in the POLY module. 2 Only available in TQ-Interface.

This is the amount of a constituent/species on a sublattice site in a phase.

V	Abbrev.	Unit	Descript.	Domain
y	Y(ph,cons#sub)	N/A	Site fraction	Constituent on a sublattice site (denoted by # and a digit) in a phase