Refrigerant 502 (Azeotrope of R-22 and R-115) properties of saturated liquid and saturated vapor

From ASHRAE (1997), with permission

Values shown in red are at the boiling point
Values shown in bold are at the critical point

Temp., °F

Pressure, psia

Density, lb/ft3

Volume, ft3/lb

Enthalpy, Btu/lb

Entropy, Btu/lb·°F

Specific heat, cp, Btu/lb·°F

cp/cv

Velocity of sound, ft/s

Viscosity, lbm/ft·h

Thermal cond., Btu/h·ft·°F

Surface tension, dyne/cm

Liquid

Vapor

Liquid

Vapor

Liquid

Vapor

Liquid

Vapor

Vapor

Liquid

Vapor

Liquid

Vapor

Liquid

Vapor

-70

8.434

94.70

4.3241

-6.564

69.570

-0.01617

0.17921

0.2506

0.1387

1.081

0.0558

16.89

-65

9.731

94.16

3.7849

-5.511

70.174

-0.01349

0.17828

0.2518

0.1399

1.040

0.0552

16.46

-60

11.182

93.61

3.3248

-4.441

70.777

-0.01080

0.17740

0.2532

0.1410

1.002

0.0545

16.03

-55

12.802

93.07

2.9306

-3.355

71.377

-0.00811

0.17656

0.2545

0.1422

0.965

0.0539

15.61

-50

14.602

92.51

2.5915

-2.252

71.975

-0.00541

0.17578

0.2559

0.1433

0.930

0.0533

15.19

-49.75

14.696

92.49

2.5761

-2.198

72.004

-0.00528

0.17574

0.2559

0.1433

0.929

0.0533

15.16

-48

15.376

92.29

2.4693

-1.807

72.213

-0.00433

0.17547

0.2564

0.1437

0.917

0.0530

15.02

-46

16.183

92.07

2.3541

-1.359

72.451

-0.00325

0.17518

0.2570

0.1442

0.904

0.0528

14.85

-44

17.022

91.84

2.2452

-0.909

72.689

-0.00217

0.17489

0.2575

0.1446

0.891

0.0525

14.68

-42

17.895

91.62

2.1425

-0.456

72.925

-0.00108

0.17461

0.2581

0.1451

0.879

0.0523

14.51

-40

18.802

91.39

2.0453

0.000

73.162

0.00000

0.17433

0.2587

0.1456

0.866

0.0520

0.00411

14.35

-38

19.746

91.17

1.9535

0.458

73.398

0.00109

0.17406

0.2592

0.1460

0.854

0.0518

0.00415

14.18

-36

20.726

90.94

1.8666

0.919

73.633

0.00217

0.17380

0.2598

0.1465

0.843

0.0516

0.00420

14.01

-34

21.744

90.71

1.7844

1.382

73.867

0.00326

0.17354

0.2604

0.1470

0.831

0.0513

0.00424

13.85

-32

22.801

90.48

1.7066

1.848

74.101

0.00434

0.17329

0.2610

0.1474

0.820

0.0511

0.00429

13.68

-30

23.897

90.25

1.6328

2.317

74.335

0.00543

0.17304

0.2616

0.1479

0.809

0.0508

0.00433

13.52

-28

25.034

90.02

1.5629

2.787

74.567

0.00652

0.17280

0.2622

0.1484

0.798

0.0506

0.00438

13.35

-26

26.212

89.79

1.4966

3.261

74.799

0.00761

0.17257

0.2627

0.1489

0.787

0.0503

0.00442

13.19

-24

27.433

89.56

1.4336

3.737

75.031

0.00870

0.17234

0.2633

0.1494

0.777

0.0501

0.00447

13.03

-22

28.697

89.32

1.3739

4.215

75.261

0.00979

0.17211

0.2639

0.1499

0.767

0.0498

0.00451

12.86

Temp., °F

Pressure, psia

Density, lb/ft3

Volume, ft3/lb

Enthalpy, Btu/lb

Entropy, Btu/lb·°F

Specific heat, cp, Btu/lb·°F

cp/cv

Velocity of sound, ft/s

Viscosity, lbm/ft·h

Thermal cond., Btu/h·ft·°F

Surface tension, dyne/cm

Liquid

Vapor

Liquid

Vapor

Liquid

Vapor

Liquid

Vapor

Vapor

Liquid

Vapor

Liquid

Vapor

Liquid

Vapor

-20

30.006

89.09

1.3172

4.696

75.491

0.01088

0.17189

0.2646

0.1504

0.757

0.0496

0.00455

12.70

-18

31.361

88.85

1.2633

5.179

75.720

0.01197

0.17168

0.2652

0.1510

0.747

0.0494

0.00460

12.54

-16

32.762

88.62

1.2120

5.665

75.948

0.01306

0.17147

0.2658

0.1515

0.737

0.0491

0.00464

12.38

-14

34.211

88.38

1.1633

6.154

76.175

0.01415

0.17126

0.2664

0.1521

0.728

0.0489

0.00468

12.22

-12

35.709

88.14

1.1169

6.644

76.402

0.01524

0.17106

0.2670

0.1526

0.719

0.0486

0.00473

12.05

-10

37.256

87.90

1.0727

7.138

76.627

0.01633

0.17087

0.2676

0.1532

0.710

0.0484

0.00477

11.89

-8

38.854

87.66

1.0307

7.633

76.852

0.01742

0.17067

0.2683

0.1538

0.701

0.0481

0.00481

11.73

-6

40.504

87.42

0.9907

8.131

77.075

0.01852

0.17049

0.2689

0.1544

0.692

0.0479

0.00485

11.58

-4

42.207

87.17

0.9525

8.632

77.298

0.01961

0.17030

0.2695

0.1550

0.684

0.0476

0.00490

11.42

-2

43.964

86.93

0.9161

9.135

77.520

0.02070

0.17012

0.2702

0.1557

0.675

0.0474

0.00494

11.26

0

45.776

86.68

0.8813

9.640

77.741

0.02180

0.16995

0.2708

0.1563

0.667

0.0472

0.00498

11.10

2

47.644

86.44

0.8482

10.147

77.960

0.02289

0.16978

0.2715

0.1570

0.659

0.0469

0.00502

10.94

4

49.569

86.19

0.8166

10.657

78.179

0.02398

0.16961

0.2721

0.1577

0.651

0.0467

0.00507

10.79

6

51.552

85.94

0.7864

11.169

78.397

0.02508

0.16944

0.2728

0.1584

0.643

0.0464

0.00511

10.63

8

53.594

85.69

0.7575

11.684

78.613

0.02617

0.16928

0.2734

0.1591

0.636

0.0462

0.00515

10.47

10

55.697

85.43

0.7299

12.200

78.828

0.02726

0.16912

0.2741

0.1598

0.628

0.0459

0.00519

10.32

15

61.226

84.80

0.6661

13.502

79.362

0.02999

0.16874

0.2758

0.1618

0.610

0.0453

0.00530

9.93

20

67.155

84.15

0.6088

14.818

79.887

0.03272

0.16838

0.2775

0.1638

0.593

0.0447

0.00541

9.55

25

73.503

83.50

0.5575

16.147

80.405

0.03545

0.16803

0.2792

0.1660

0.576

0.0441

0.00552

9.17

30

80.287

82.83

0.5112

17.490

80.913

0.03818

0.16770

0.2809

0.1684

0.561

0.0435

0.00562

8.79

Temp., °F

Pressure, psia

Density, lb/ft3

Volume, ft3/lb

Enthalpy, Btu/lb

Entropy, Btu/lb·°F

Specific heat, cp, Btu/lb·°F

cp/cv

Velocity of sound, ft/s

Viscosity, lbm/ft·h

Thermal cond., Btu/h·ft·°F

Surface tension, dyne/cm

Liquid

Vapor

Liquid

Vapor

Liquid

Vapor

Liquid

Vapor

Vapor

Liquid

Vapor

Liquid

Vapor

Liquid

Vapor

35

87.523

82.16

0.4695

18.846

81.413

0.04090

0.16738

0.2827

0.1709

0.545

0.0285

0.0429

0.00573

8.42

40

95.229

81.47

0.4318

20.216

81.903

0.04362

0.16707

0.2845

0.1735

0.531

0.0288

0.0423

0.00584

8.05

45

103.42

80.77

0.3976

21.597

82.383

0.04633

0.16678

0.2863

0.1764

0.517

0.0292

0.0417

0.00595

7.68

50

112.12

80.06

0.3666

22.991

82.852

0.04904

0.16649

0.2882

0.1794

0.0296

0.0411

0.00607

55

121.34

79.33

0.3383

24.397

83.310

0.05174

0.16621

0.2900

0.1827

0.0300

0.0404

0.00618

60

131.10

78.59

0.3126

25.814

83.755

0.05444

0.16594

0.2919

0.1861

0.0304

0.0398

0.00629

65

141.42

77.83

0.2892

27.244

84.187

0.05713

0.16566

0.2938

0.1898

0.0308

0.0392

0.00641

70

152.32

77.06

0.2677

28.685

84.606

0.05982

0.16539

0.2958

0.1937

0.0312

0.00653

75

163.81

76.27

0.2480

30.138

85.009

0.06249

0.16512

0.2977

0.1978

0.0316

0.00665

80

175.92

75.46

0.2299

31.602

85.397

0.06517

0.16484

0.2997

0.2022

0.0320

0.00678

85

188.66

74.62

0.2133

33.078

85.767

0.06783

0.16456

0.3017

0.2068

0.0324

0.00690

90

202.06

73.77

0.1980

34.566

86.118

0.07049

0.16427

0.3037

0.2117

0.0328

0.00703

95

216.13

72.88

0.1839

36.066

86.449

0.07314

0.16397

0.3058

0.2168

0.0332

0.00716

100

230.89

71.97

0.1708

37.578

86.758

0.07579

0.16366

0.3079

0.2223

0.0336

0.00730

105

246.38

71.02

0.1587

39.104

87.042

0.07843

0.16332

110

262.61

70.04

0.1474

40.644

87.298

0.08107

0.16297

115

279.61

69.02

0.1369

42.201

87.524

0.08371

0.16258

120

297.41

67.96

0.1271

43.774

87.716

0.08635

0.16216

125

316.05

66.84

0.1179

45.369

87.869

0.08901

0.16170

130

335.54

65.66

0.1094

46.987

87.977

0.09167

0.16118

Temp., °F

Pressure, psia

Density, lb/ft3

Volume, ft3/lb

Enthalpy, Btu/lb

Entropy, Btu/lb·°F

Specific heat, cp, Btu/lb·°F

cp/cv

Velocity of sound, ft/s

Viscosity, lbm/ft·h

Thermal cond., Btu/h·ft·°F

Surface tension, dyne/cm

Liquid

Vapor

Liquid

Vapor

Liquid

Vapor

Liquid

Vapor

Vapor

Liquid

Vapor

Liquid

Vapor

Liquid

Vapor

135

355.94

64.41

0.1013

48.634

88.032

0.09435

0.16060

140

377.30

63.08

0.0936

50.316

88.024

0.09706

0.15994

145

399.65

61.65

0.0863

52.045

87.941

0.09982

0.15919

150

423.06

60.09

0.0793

53.834

87.763

0.10265

0.15830

155

447.61

58.37

0.0726

55.705

87.463

0.10558

0.15724

160

473.39

56.43

0.0660

57.698

86.997

0.10867

0.15595

165

500.50

54.17

0.0595

59.878

86.293

0.11202

0.15430

170

529.11

51.39

0.0527

62.386

85.198

0.11584

0.15207

175

559.42

47.55

0.0451

65.610

83.303

0.12073

0.14861

179.9

591

35

0.0286

74.81

74.81

0.1346

0.1346

inf.

inf.

inf.

0

0

inf.

inf.

0