Page 20 - Mechanical Engineers' Handbook (Volume 4)

Thermophysical Properties of Fluids 9

Table 3 (Continued)

T m h m T b h v T c P c
Substance (K) (kJ/kg) (K) (kJ/kg) (K) (bar)
Propane 86 80 231.1 426 370 42.5
Propanol 147 86.5 370.4 696 537 51.7
Propylene 87.9 71.4 225.5 438 365 46.2
Refrigerant 12 115 34.3 243.4 165 385 41.2
Refrigerant 13 92 191.8 148 302.1 38.7
Refrigerant 13B1 105.4 215.4 119 340 39.6
Refrigerant 21 138 282.1 242 451.7 51.7
Refrigerant 22 113 47.6 232.4 234 369 49.8
Steam/water 273.2 334 373.2 2257 647.3 221.2
Sulfuric acid 283.7 100.7 v v v v
Sulfur dioxide 197.7 115.5 268.4 386 430.7 78.8
Toluene 178.2 383.8 339 594 41
a v variable; T m normal melting point; h m enthalpy of fusion; T b normal boiling point; h v enthalpy of
vaporization; T c critical temperature; P c critical pressure.

Table 4 Thermodynamic Properties of Liquid and Saturated Vapor Air a
P ƒ P g v ƒ v g h ƒ h g s ƒ s g
3
3
T (K) (MPa) (MPa) (m /kg) (m /kg) (kJ/kg) (kJ/kg) (kJ/kg K) (kJ/kg K)
60 0.0066 0.0025 0.001027 6.876 144.9 59.7 2.726 6.315
65 0.0159 0.0077 0.001078 2.415 144.8 64.5 2.727 6.070
70 0.0340 0.0195 0.001103 1.021 144.0 69.1 2.798 5.875
75 0.0658 0.0424 0.001130 0.4966 132.8 73.5 2.896 5.714
80 0.1172 0.0826 0.001160 0.2685 124.4 77.5 3.004 5.580
85 0.1954 0.1469 0.001193 0.1574 115.2 81.0 3.114 5.464
90 0.3079 0.2434 0.001229 0.0983 105.5 84.1 3.223 5.363
95 0.4629 0.3805 0.001269 0.0644 95.4 86.5 3.331 5.272
100 0.6687 0.5675 0.001315 0.0439 84.8 88.2 3.436 5.189
105 0.9334 0.8139 0.001368 0.0308 73.8 89.1 3.540 5.110
110 1.2651 1.1293 0.001432 0.0220 62.2 89.1 3.644 5.033
115 1.6714 1.5238 0.001512 0.0160 49.7 87.7 3.750 4.955
120 2.1596 2.0081 0.001619 0.0116 35.9 84.5 3.861 4.872
125 2.743 2.614 0.001760 0.0081 19.7 78.0 3.985 4.770
132.5 b 3.770 3.770 0.00309 0.0031 33.6 33.6 4.38 4.38
a v specific volume; h specific enthalpy; s specific entropy; ƒ saturated liquid; g saturated vapor. 1 MPa 10 bar.
b
Approximate critical point. Air is a multicomponent mixture.