J. Res. Instrum. [all data], Parks, Shomate, et al., 1937 ; Gronert, S.; Barlow, S.E. Phys., 1937, 5, 359-363. Sage B.H., ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein Faraday Trans. 1.1, California Environmental Protection Agency, Air Resources Board, El Monte, California, 1997, 22. class: Standard non-polar; Column diameter: 0.32 mm; Column length: 60 m; Column type: Capillary; Description: -40 C for 12 min; -40 - 125 C at 3 deg.min; 125-185 C at 6 deg/min; 185 - 220 C at 20 deg/min; hold 220 C for 2 min; CAS no: 115117; Active phase: DB-1; Carrier gas: He; Phase thickness: 1.0 um; Data type: Kovats RI; Authors: Hoekman, S.K., Improved gas chromatography procedure for speciated hydrocarbon measurements of vehicle emissions, J. Isobutane is 310.9 kPa (45.09 PSI) vs n butane at 215.1 kPa (31.2 PSI) with both at 21ºC (69.8ºF). MLD 118, Revision No. Soc. ; Bierbaum, V.M. Your institution may already be a subscriber. Res. Soc., 1943, 65, 44-46. Another isomer is isobutane with three carbon atoms in the parent chain and one in the side-chain as a methyl group. ; Crawford, B.L., Jr., XX. J. The purpose of the fee is to recover costs associated Whilst the chemical formula for isobutane and n butane are the same, isobutane is an isomer of butane, with a different arrangement of the atoms. ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein. Ideal gas thermodynamic properties and isomerization of n-butane and isobutane, Analysis of low-molecular-weight hydrocarbons and nitriles with a PoraPLOT Q porous polymer coated open-tubular capillary column, J. Org. J. Phys. First one is n-butane which has all four carbon atoms in the parent chain with structural formula as. The purpose of the fee is to recover costs associated Data Program, but require an annual fee to access. Stabilization of Cycloalkyl Carbanions in the Gas Phase, ; Chupalov, A.A.; Herzschuh, R., Correlation of the Increments of Gas Chromatographic Retention Indices with the Differences of Innermolecular Energies of Reagents and Products of Chemical Reactions, Zh. Soc., 1984, 106, 4051. Wacker P.F., J. Chem. Aston, J.G. 1 0. Chem. Remove sources ofigntion from the working area. Join Yahoo Answers and get 100 points today. Khim. C p,liquid: Constant pressure heat capacity of liquid: S° liquid Entropy of liquid at standard conditions ; Damrauer, R., & Chromatogr. Chem. Phase equilibrium in hydrocarbon systems. The entropies and related properties of branched paraffin hydrocarbons, III. Chromatogr., 15, 1992, 75-84. umn class: Standard non-polar; Column length: 2.5 m; Column type: Packed; Start T: 50 C; CAS no: 115117; Active phase: Methyl Silicone; Carrier gas: Nitrogen; Substrate: Celite C-22; Data type: Normal alkane RI; Authors: Huguet, M., Kovats retention indices in the qualitative analysis of light hydrocarbons by gas chromatography, Journees internationales d'etude des methodes de separation immediate et de chromatographie, 1961, 69. ass: Semi-standard non-polar; Column length: 2 m; Column type: Packed; Heat rate: 5 K/min; Start T: 50 C; End T: 220 C; End time: 0 min; Start time: 0 min; CAS no: 115117; Active phase: Porapack Q; Carrier gas: Nitrogen; Data type: Normal alkane RI; Authors: Zenkevich, I.G. The molecular formula lists the number and type of atoms but gives no indication of the bonds between them. Environ., 39, 2005, 6707-6718. class: Standard non-polar; Column length: 20 ft; Column type: Packed; Description: 50C910min)=>20C/min=>90(6min)=>10C/min=>150C(hold); CAS no: 115117; Active phase: SE-30; Carrier gas: N2; Substrate: Chromosorb W; Data type: Normal alkane RI; Authors: Robinson, P.G. Note: Please consider using the The Gas Phase Acidities of the Alkanes, Favorite Answer. and Informatics, Microwave spectra (on physics lab web site), Computational Chemistry Comparison and Benchmark Database, NIST / TRC Web Thermo Tables, "lite" edition (thermophysical and thermochemical data), NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data), Eugene S. Domalski and Elizabeth D. Hearing, Recommended values are in good agreement with those calculated by [, Other experimental values of heat capacity [. ; Rademaker, G.J. Phys., 1937, 5, 359-363. Data compilation copyright how big is 18 mm … Part 8.-Methane, ethane, propane, n-butane and 2-methylpropane, DePuy, C.H. Soc., 1940, 62, 2059-2063. Rapid Commun. ; Pilcher, G., CH 3-CH 2-CH 2-CH 3. II. by the U.S. Secretary of Commerce on behalf of the U.S.A. (China), 24(10), 2007, 1404-1408. class: Standard non-polar; Column diameter: 0.32 mm; Column length: 60 m; Column type: Capillary; Description: -50 0C (2 min) ^ 8 0C/min -> 200 0C (7.75 min) ^ 25 0C -> 225 0C (8 min); CAS no: 115117; Active phase: Methyl Silicone; Carrier gas: Helium; Phase thickness: 1.0 um; Data type: Normal alkane RI; Authors: Blunden, J.; Aneja, V.P. 1, 1972, 68, 2224-2229. Am. NBS, 1935, 15, 357-361. ; Kennedy, R.M. Prosen, E.J. Technology, Office of Data Gas Chromatogr., 6, 1968, 203-217. umn class: Semi-standard non-polar; Column type: Packed; Start T: 80 C; CAS no: 115117; Active phase: Squalane; Data type: Kovats RI; Authors: Chretien, J.R.; Dubois, J.E., Topological analysis of gas-liquid chromatographic behavior of alkenes, Anal. & Chromatogr. Appl. C4H10 = Isobutane ===> CH3CH(CH3)CH3 Heats of organic reactions. Data compiled as indicated in comments: of all reactions involving this species. (Rus. NIST Standard Reference The heat capacity and entropy, heats of fusion and vaporization and the vapor pressure of isobutane, Res. Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. Standard Reference Data Act.