State Variables Available for TQGETV and TQGET1

STAVAR INDEXP INDEXC Meaning Comments

T

 

 

Temperature

of the whole system

P

 

 

Pressure

of the whole system

MU

(yes)

Yes

Chemical potential

of a system component

MUC

Yes

yes

Chemical potential

of a constituent in a gas phase

AC

(yes)

Yes

Activity

of a system component

ACC

Yes

Yes

Activity

of a constituent in a gas phase

QF

Yes

 

Phase stability function

Negative when phase composition is inside a spinodal, otherwise positive. Can be used to find out if an equilibrium is within the miscibility gap for a solution phase. Cannot be used as a condition.

V

 

 

Volume

of the whole system

V

Yes

 

Volume

of a phase

G*

 

 

Gibbs energy

of the whole system

G*

Yes

 

Gibbs energy

of a phase

H*

 

 

Enthalpy

of the whole system

H*

Yes

 

Enthalpy

of a phase

S*

 

 

Entropy

of the whole system

S*

Yes

 

Entropy

of a phase

CP

 

 

Heat capacity

of the system

CP

Yes

 

Heat capacity

of a phase

DG

Yes

 

Driving force

of a phase

N

 

 

Moles

of all system components

N

 

Yes

Moles

of a system component

NP

Yes

 

Moles

of a system phase

M

 

 

Total mass

of all system components

M

 

Yes

Mass

of a system component

BP

Yes

 

Mass

of a system phase

IN

Yes

Yes

Input amount

in moles of phase constituents

IM

Yes

Yes

Input amount

in mass units of phase constituents

X

 

Yes

Mole fraction

of a component in the whole system

X

Yes

Yes

Mole fraction

of a component in a phase

W

 

Yes

Mass (Weight) fraction

of a component in the whole system

W

Yes

Yes

Mass (Weight) fraction

of a component in a phase

X%

 

Yes

Mole percent

of a component in the whole system

X%

Yes

Yes

Mole percent

of a component in a phase

W%

 

Yes

Mass (Weight) fraction

of a component in the whole system

W%

Yes

Yes

Mass (Weight) fraction

of a component in a phase

Y

Yes

Yes

Constituent fraction

of a  phase constituent

* You can add a normalizing suffix like M (per mole), W (per mass) or V (per volume) on G, H, S, etc. R can also be added as a suffix on G, H, S to get a value that is calculated with respect to the reference state specified by calling TQSETR.
STAVAR Meaning Unit

M(phase,J)

Mobility coefficient where J=diffusing species

m2mol J-1 s-1

LOGM(phase,J)

10log of the mobility coefficient

log10 (m2mol J-1s-1)

DT(phase,J)

Tracer diffusion coefficient where J=diffusing species

m2/s

LOGDT(phase,J)

10log of the tracer diffusion coefficient

log10 (m2s-1)

DC(phase,J,K,N)

Chemical diffusion coefficient where K=gradient species, and N=reference species

m2/s

LOGDC(phase,J,K,N)

10log of the chemical diffusion coefficient

log10 (m2s-1)

DI(phase,J,K,N)

Intrinsic diffusion coefficient

m2/s

LOGDI(phase,J,K,N)

10log of the intrinsic diffusion coefficient

m2/s