APPENDIX J
FREE PROGRAM VARIABLES
Symbol
Description
ATOM
Stoichiometric coefficient of element being considered in computation of ((H
o
298
) / T) - S
t
.
B
Stoichiometric coefficient of element read from the specie card.
COEF
Coefficients read from element data cards and specie cards.
DATE1
DATE2
Reference date read from species card.
F
ΔG
o
f
, Gibbs free energy.
H
ΔH
o
298
, Dimensionless enthalpy calculated from coefficient cards.
HSUM
ΔH
o
298
, enthalpy of elements of specie being considered.
HT
Σ((H
.t
- H
298
) / T), summation of enthalpy of elements of specie being considered.
I, J, N,
M, L
Do loop indices.
IAL
IC
ICA
IH
IO
ISI
IT
MG
Code words indicating element on specie card is aluminum, carbon, calcium, hydrogen, oxygen, silicon, titanium or magnesium.
INE
Counter to identify element on specie card being considered
JJ
Determines which element or specie coefficients are to be used to compute S and H.
K
Determines what set of coefficients are to be used from coefficient cards.
KK
Stores value of K.
LT
Lower limit of T range.
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Symbol
Description
MT
Alphameric symbol of element on specie card.
NAM
Alphameric name of specie being considered.
NC
NC1
NC2
NC3
Code words used to determine if coefficient cards are in correct order.
NT
Upper limit of T range.
PHAZ
Phase of specie being considered.
R
Gas constant, 1.98717 ± .0003 cal deg-gfw
-1
.
S
S
t
/ R, dimensionless entropy calculated from coefficient cards.
ST
ΣS
t
, summation of entropy of elements in specie being considered.
SUM
S
t
, entropy of specie being considered.
Tl
T2
Lower and upper limits of T range read from specie cards.
TEMP
T to be considered from DATA statement.
TLN
ln T, natural logarithm of T being considered.
TT
Present T being considered.
VOL
Molar volume of specie being considered.
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