To get a thermodynamic property calculated from 2 specified inputs for a given gas:

Plot of H2 equilibrium Gas at 172 kPa Press.

(bold black: you enter. colored: calculated)

1st input step size:

0

2nd input step size:

0.1

1st input

1st input

2nd input

2nd input

Output

2nd input

Output

Output:

Gas

parameter

Press.

parameter

Temp.

Property

Desired

Desired

Density

Index

Gas

Index

kPa

Index

K

Index

Phase

Units

g/cm^3

12

H2 equilibr

1

172

2

18

3

0

2

0.07336

12

H2 equilibr

1

172

2

18.1

3

0

2

0.07326

12

H2 equilibr

1

172

2

18.2

3

0

2

0.07316

12

H2 equilibr

1

172

2

18.3

3

0

2

0.07306

12

H2 equilibr

1

172

2

18.4

3

0

2

0.07295

12

H2 equilibr

1

172

2

18.5

3

0

2

0.07285

12

H2 equilibr

1

172

2

18.6

3

0

2

0.07275

12

H2 equilibr

1

172

2

18.7

3

0

2

0.07264

12

H2 equilibr

1

172

2

18.8

3

0

2

0.07254

12

H2 equilibr

1

172

2

18.9

3

0

2

0.07243

12

H2 equilibr

1

172

2

19

3

0

2

0.07232

12

H2 equilibr

1

172

2

19.1

3

0

2

0.07222

12

H2 equilibr

1

172

2

19.2

3

0

2

0.07211

12

H2 equilibr

1

172

2

19.3

3

0

2

0.07200

Pressure conversions:

12

H2 equilibr

1

172

2

19.4

3

0

2

0.07189

Pa =

12

H2 equilibr

1

172

2

19.5

3

0

2

0.07178

kPa

N/m^2

psia

atm

in. H20

cm-Hg

lb/ft^2

Torr

psig

12

H2 equilibr

1

172

2

19.6

3

0

2

0.07167

185.00

185000

26.84

1.83

742.74

138.77

3864.65

1387.69

12.14

12

H2 equilibr

1

172

2

19.7

3

0

2

0.07156

172.00

172000

24.95

1.70

690.58

129.02

3593.08

1290.17

10.25

12

H2 equilibr

1

172

2

19.8

3

0

2

0.07144

172.32

172322.3

25.00

1.70

691.87

129.26

3599.81

1292.59

10.30

12

H2 equilibr

1

172

2

19.9

3

0

2

0.07133

101.33

101325.5

14.70

1.00

406.82

76.00

2116.69

760.04

0.00

12

H2 equilibr

1

172

2

20

3

0

2

0.07122

101.33

101330.5

14.70

1.00

406.82

76.01

2116.79

760.08

0.00

12

H2 equilibr

1

172

2

20.1

3

0

2

0.07110

101.34

101338.5

14.70

1.00

406.85

76.00

2116.96

760.00

0.00

12

H2 equilibr

1

172

2

20.2

3

0

2

0.07099

101.32

101319.8

14.70

1.00

406.80

76.00

2116.68

760.00

0.00

12

H2 equilibr

1

172

2

20.3

3

0

2

0.07087

101.34

101343.9

14.70

1.00

406.87

76.00

2117.07

760.04

0.00

Values at

24.95324

psia (=

172

kPa), and

18

K

Gas/Fluid

Constant

Input

Output

<--------------- Units Index --------------->

Index

Fluid

Index

Constants

Index

Inputs

ID

1

2

3

4

Value

2

Argon

1

Pressure Upper Limit

120000

1

Press.

1

Pressure

Pa

kPa

kPa

psi

172.0000

kPa

3

Isobutane

2

Temp upper limit

5000

2

Temp.

2

Temperature

K

K

K

R

18.0000

K

7

Deuterium

3

temp lower limit

13.8

3

Density

3

Density

kg/m^3

g/cm^3

mol/liter

lbm/ft^3

0.0734

g/cm^3

11

Helium

4

gas constant R

8.31434

4

Entropy

4

Entropy

J/kg-K

J/g-K

J/mol-K

BTU/lb-R

1.1160

J/g-K

12

H2 equilibrium

5

critical pressure

1283.8

5

Enthalpy

5

Enthalpy

J/kg

J/g

J/mol

BTU/lb

-301.7211

J/g

13

H2 normal

6

critical temp

32.938

6

Internal Energy

6

internal energy

J/kg

J/g

J/mol

BTU/lb

-304.0657

J/g

14

H2 ortho

7

critical density

15.556

7

Quality (vapor mass fr

7

dP/dD

Pa-m^3/kg

kPa-m^3/k

kPa-L/mol

psi-ft^3/lb

895.3686

kPa-m^3/kg

15

H2 para

8

triple point pressure

7.042088

8

Melting Line

8

dP/dT

Pa/K

kPa/K

kPa/K

psi/R

898.7500

kPa/K

20

Neon

9

triple point temp (m.p.

13.8

9

2-Phase

9

Cv

J/kg-K

J/g-K

J/mol-K

BTU/lb-R

5.4266

J/g-K

22

N2

10

triple point vapor dens

0.062382

10

Saturation

10

Cp

J/kg-K

J/g-K

J/mol-K

BTU/lb-R

8.4441

J/g-K

25

O2

11

triple point liquid densi

38.21425

11

Gamma

-

-

-

-

1.5560

-

27

Water

12

molecular weight

2.01594

12

Alpha

-

-

-

-

0.2463

-

28

Xenon

13

pressure of the stand

101.325

13

Gruneisen

-

-

-

-

2.2576

-

17

Krypton

14

accentric factor

-0.21844

14

Kt

-

-

-

-

0.0000

-

15

Sound Speed

m/s

m/s

m/s

ft/s

1180.3520

m/s

16

JT Coeff

K/Pa

K/kPa

K/kPa

R/psi

-0.0012

K/kPa

Units

Phase

17

dH/dV *V@const P

J/kg

J/g

J/mol

BTU/lb

617.1200

J/g

Index

Units

Index

Phases

18

dH/dT @const dens

-

-

-

-

17.6780

-

1

SI

0

Single Phase

19

dS/dT @const dens

-

-

-

-

0.6078

-

2

Mixed SI & CGS

1

Liquid Phase (use with saturation input)

20

Z compressibility fa

1/Pa

1/kPa

1/kPa

1/psi

0.0316

1/kPa

3

Mixed SI & Molar

2

Vapor Phase (use with saturation input)

21

Viscosity

Pa-s

uPa-s

uPa-s

lb/ft-s

16.7841

uPa-s

4

Engineering

22

Conductivity

W/m-K

W/m-K

W/m-K

BTU/hr-ft-

0.1036

W/m-K

23

Thermal Diffusivity

m^2/s

cm^2/s

cm^2/s

ft^2/s

0.0017

cm^2/s

Temperature Conversions:

24

Prandtl Number

-

-

-

-

1.3685

-

Kelvin

Centigrade

Farenheit

25

Surface Tension

N/m

N/m

N/m

N/m

0.0000

N/m

161

-112.15

-169.87

26

Dielectric Constant

-

-

-

-

1.2387

-

87.15

-186

-302.8

27

PV/RT

-

-

-

-

0.0316

-

273.15

0

32

28

dP/dT @ const sat

Pa/K

kPa/K

kPa/K

psi/R

0.0000

kPa/K

29

latent heat

J/kg

J/g

J/mol

BTU/lb

0.0000

J/g

30

Fugacity/Pressure

-

-

-

-

1.0000

-