R600a
58.13           {molecular weight of Isobutane}
0               {not used}
16.82021        {a} Liquid density=a+b*Tz^(1/3)+c*Tz^(2/3)+d*Tz+e*Tz^(4/3) 
-3.33390        {b}                                           +f*sqrt(Tz)+g*(Tz)^2}
99.34208        {c}     where Tz=(1-T/Tc) and Liquid Density[=]lbm/ft3
-118.74205      {d}
59.04652        {e}
0               {f}
0               {g}
-6421.98971     {a}  Vapor pressure fit: lnP=a/T+b+cT+d(1-T/Tc)^1.5+eT^2
15.30255        {b}     where T[=]¡R and P[=]psia
-0.0003452      {c}
5.56792         {d}
0               {e}
0               {not used}
.184678         {Gas constant in psia-ft3/lbm-R}
4.9512e-3       {b}  Constants for Martin-Hou EOS/English_units
-19.122         {A2}
8.6323e-3       {B2}
-278.091        {C2}
0.92000         {A3}
-3.6962e-4      {B3}
16.881          {C3}
-1.8611e-2      {A4}
0               {B4}
0               {C4}
0               {A5}
2.8861e-7       {B5}
-4.3322e-3      {C5}
0               {A6}
0               {B6}
0               {C6}
5.475           {Bexp - Martin-Hou exponential constant}
0               {alpha}
0               {C'}
-1.036e-1       {a}   Cv(0 pressure) = a + b T + c T^2 + d T^3 + e/T^2
8.4338e-4       {b}           where T[=]R and Cv[=]Btu/lb-R
3.3838e-8       {c}
-1.5939e-10     {d}
8.6830e+3       {e}
245.696         {href offset}
1.100386        {sref offset}
529.1           {Pc [=] psia}
734.60          {Tc [=] R} 
0.071           {vc [=] ft3/lbm}
0               {not used}
0               {not used}
2               {Viscosity correlation type: set to 2: do not change}
220             {Lower limit of gas viscosity correlation in K}
533.15          {Upper limit of gas viscosity correlation in K}
-6.92838204e4       {A}    GasViscosity*1E12=A+B*T+C*T^2+D*T^3 
2.69967801e4        {B}    where T[=]K and GasViscosity[=]N-s/m2
-5.17091446         {C}
1.40814391e-3       {D}
210                 {Lower limit of liquid viscosity correlation in K}
408                 {Upper limit of liquid viscosity correlation in K}
5.22601251e3        {A}   Liquid Viscosity*1E6=A+B*T+C*T^2+D*T^3
-4.35351547e1       {B}    where T[=]K and Liquid Viscosity[=]N-s/m2
1.25764430e-1       {C}
-1.23292425e-4      {D}
2                   {Conductivity correlation type: set to 2: do not change}
220                 {Lower limit of gas conductivity correlation in K} 
540                 {Upper limit of gas conductivity correlation in K}
3.62902336e-3       {A}   GasConductivity=A+B*T+C*T^2+D*T^3
-3.56892580e-5      {B}    where T[=]K and GasConductivity[=]W/m-K
3.36041256e-7       {C}
-2.50300644e-10     {D} 
210                 {Lower limit of liquid conductivity correlation in K}
410                 {Upper limit of liquid conductivity correlation in K}
4.03602168e-1       {A}   LiquidConductivity=A+B*T+C*T^2+D*T^3
-2.40870093e-3      {B}    where T[=]K and LiquidConductivity[=]W/m-K
7.24412461e-6       {C}
-8.38473070e-9      {D}
0                   {not used: terminator}
