Physical Chemistry Third Edition

1210 A Tables of Numerical Data

Table A.3 Parameters for Some Equations of State

(Parameters for the van der Waals Equation of State

P+

a

Vm^2

)

(Vm−b)RT; P

RT

Vm−b

−

a

Vm^2

Substance a/Pa m^6 mol−^2 b× 105 /m^3 mol−^1

Ammonia 0. 4225 3. 707

Argon 0. 1363 3. 219

Carbon dioxide 0. 3640 4. 267

Helium 0. 003457 2. 370

Hydrogen 0. 02476 2. 661

Methane 0. 2283 4. 278

Neon 0. 8636 1. 709

Nitrogen 0. 1408 3. 913

Oxygen 0. 1378 3. 183

Xenon 0. 4250 5. 105

Water 0. 5536 3. 049

( Parameters for the Berthelot Equation of State

P+

a

TVm^2

)

(Vm−b)RT; P

RT

Vm−b

−

a

TVm^2

Substance a/Pa m^6 mol−^2 K b× 105 /m^3 mol−^1

Ammonia 171 3. 70

Argon 20. 53. 20

Carbon dioxide 111 4. 28

Helium 0. 019 2. 41

Methane 43. 64. 27

Neon 0. 98 1. 77

Nitrogen 17. 33. 87

Oxygen 21. 33. 18

Xenon 121 5. 13

Water 357 3. 04

Parameters for the Dieterici Equation of State

Pea/VmRT(Vm−b)RT; P

RT

Vm−b

e−a/VmRT

Substance a/Pa m^6 mol−^2 b× 105 /m^3 mol−^1

Ammonia 0. 540 4. 00

Argon 0. 174 3. 47

Carbon dioxide 0. 468 4. 63

Helium 0. 0046 2. 60

Hydrogen 0. 031 2. 83

Methane 0. 293 4. 62

Neon 0. 028 1. 91

Nitrogen 0. 176 4. 19

Oxygen 0. 177 3. 45

Xenon 0. 536 5. 56

Water 0. 709 3. 29

(continued)