PHYSICAL CONSTANTS OF HYDROCARBONS C, TO C10 Prepared by ASTM Committee D-2 on Petroleum Products and Lubricants and API Research Project 44 on Hydrocarbons and Related Compounds ASTM DATA SERIES PUBLICATION DS 4A List price $4.00 05-004010-12 AMERICAN SOCIETY FOR TESTING AND MATERIALS 1916 Race Street, Philadelphia, Pa 19103 1971 Library of Congress Catalog Card Number :79—170766 ©BY AMERICAN SOCIETY FOR TESTING AND MATERIALS NOTE The Society is not responsible, as a body, for the statements and opinions advanced in this publication Printed in Baltimore, Md August 1971 Foreword The tabulation of the physical constants of d to Cio hydrocarbons, shown as Tables 1C1.1 through 1C1.17, is based upon a revision of Data Series prepared for publication by Committee D-2 on Petroleum Products and Lubricants of the American Society for Testing and Materials Constants in both the U.S and metric systems are tabulated The major source of data for thetabulation is the findings of API Research Project 44, Data on Hydrocarbons and Related Compounds These data are either selected critically, calculated precisely, or of good experimental quality Data included from other sources are shown in italics Estimated values of properties are shown in parentheses The atomic weights used are based on oxygen = 15.9994, carbon = 12.011, and hydrogen = 1.0080 Related ASTM Publications Manual on Hydrocarbon Analysis, STP 332A (1968), $16.00 Automated Analyzers and Quality Control for the Petroleum Industry, STP 428 (1968),, $3.50 Contents Table 1C1.1 1C1.2 1C1.3 1C1.4 1C1.5 1C1.6 1C1.7 1C1.8 U S Units Page Paraffins Cycloparaffins 14 Monoolefins and Diolefins 22 Cycloolefins 24 Acetylenes Alkylbenzenes, Naphthalene, Indans, and Tetrahydronaphthalene 26 28 Styrenes and Indenes Gaseous Hydrocarbons, C{ to C5 30 1C1.9 1C1.10 1C1.11 1C1.12 1C1.13 1C1.14 1C1.15 1C1.16 1C1.17 I II III IV V Paraffins Cycloparaffins Monoolefins and Diolefins Cycloolefins Acetylenes Alkylbenzenes, Naphthalene, Indans, and Tetrahydronaphthalene Styrenes and Indenes Gaseous Hydrocarbons, Ci to C5 Appendixes Key to Footnotes (Superscripts) Units and Conversion Factors Definitions of Properties Key to References References Metric Units 32 38 44 52 54 56 58 60 61 61 61 65 71 DS4A-EB/Aug 1971 1C1.1 TABLE 1C1.1—Paraffins (U.S Units) Critical Constants No Compound Paraffins, Ci to Ci: Methane, CH(, M.W 16.043 Ethane, C2Hs, M.W 30.070 Propane, CjHs, M.W 44.097 Paraffins, C.Hio, M.W 58.124: n-Butane 2-Methylpropane (isobutane) Paraffins, CBHIS, M.W 72.151: rc-Pentane 2-Methylbutane (isopentane) 2,2-Dimethylpropane (neopentane) Boiling Point at atmos, deg Fahr Freezing Vapor Point in Pres- Air at sure at atmos, 100 F, deg psi Fahr Pressure, psi Temperature, deg Fahr Volume, cu ft per lb API Specific Gravity* » Gravity ' at 60 60 F/60 F F, deg API Density of the Liquid*' °»* at 60 F Coefficient of Expansion** ° Refractive Index of the Liquid," no v\aTfp at 60 F, per deg Fahr lb per cu ft lb per gal 18.70' Sl.l6d 31.59"* S.l> 4.223* 0.00152'' at68F at77F -296.46" -297.89" -305.84e 667.8 -116.63 0.0991 707.8 +90.09 0.0788 616.3 206.01 0.0737 O.S> 0.8S84d 0.5077d S40' -217.05 -255.29 550.7 529.1 305.65 0.0702 274.98 0.0724 0.58441' o^si* 110.6'* 119.8"' se.sg"' 35.05* 4.8651* 4.686a CO2 (ideal gas, 25 C, atmos) + - H2O (ideal gas, 25 C, atmos) These two types of heat of combustion are related at 25 C by: ACV M.W f« + ij GP(02, gas) — Cj,(CaHi,) M.W [1.854a+2.3476] M.W • CP(CaH-b) where the enthalpy of vaporization of onehalf mole of water from the liquid to the ideal gas is 5.2595 kcal per mole The heat of combustion in cal per g is obtained by: Cj^dHi,) is the specific heat of the liquid hydrocarbon in Btu per (lb)(deg Fahr) The heat capacities of other substances are