Page 307 - Valve Selection Handbook

Table B-l
Physical Constants of Gases

PC
M R Isentropic T< Critical
Molecular Individual Coefficient Critical Pressure
Gas Mass Gas Constant kfor Tempe rature (absolute)
P -» aim
kg Lb J ft.lbf T = 273K
kmol Ibmol kg.K lb.°R = 492R °K °R MPa Ib/in2
Acetylene C 2H 2 26.078 318.82 59.24 1.23 309.09 556.4 6.237 904.4
Air — 28.96 287.09 53.35 1.40 132.4 238.3 3.776 547.5
Ammonia NH 3 17.032 488.15 90.71 1.31 405.6 730.1 11.298 1638.2
Argon Ar 39.994 208.15 38.68 1.65 150.8 271.4 4.864 705.3

Benzol C 6H 6 78.108 106.44 19.78 — 561.8 1011.2 4.854 703.9
Butane-n C 4H 10 58.124 143.04 26.58 — 425.2 765.4 3.506 508.4
Butan-i C 4H 10 58.124 143.04 26.58 — 408.13 734.6 3.648 529.0
Butylene C 4H 8 56.108 148.18 27.54 — 419.55 755.2 3.926 569.2

Carbon dioxide C0 2 44.011 188.91 35.10 1.30 304.2 547.6 7.385 1070.8
Carbon disulfide CS 2 76.142 109.19 20.29 — 546.3 983.3 7.375 1069.4
Carbon monoxide CO 28.011 296.82 55.16 1.40 133.0 239.4 3.491 506.2

(table continued)