Thermodynamic properties of furan

Journal Article · Sat Sep 20 00:00:00 EDT 1952 · J. Am. Chem. Soc.; (United States)

DOI:https://doi.org/10.1021/ja01138a063· OSTI ID:7305368

Guthrie, Jr, G B; Scott, D W; Hubbard, W N; Katz, C; McCullough, J P; Gross, M E; Williamson, K D; Waddington, G

A sample of furan was purified and used for calorimetric studies and for measurement of vapor pressure, density, refractive index, infrared spectrum (2 to 15..mu..) and mass spectrum. The heat of formation of liquid furan (-..delta..H/sub t/ = 14.90 kcal mole/sup -1/) was derived from heat of combustion measurements. Low temperature thermal studies included measurement of the heat capacity of the solid, transition temperature (150.0/sup 0/K), heat of transition (489.2 cal. mole/sup -1/), triple point (187.55/sup 0/K), heat of fusion (908.8 cal. mole/sup -1/) and heat capacity of the liquid. The entropy of the liquid at 298.16/sup 0/K, calculated from these data is 42.22 cal. deg./sup -1/ mole/sup -1/. The observed vapor pressures between 2 and 62/sup 0/ are represented by the equation log/sub 10/p (mm) = 6.97523 - 1060.851 (t + 227.740). The heat of vaporization at the normal boiling point (31.36/sup 0/) is 6474 cal. mole/sup -1/. The vapor heat capacity, measured at five temperatures between 317 and 488/sup 0/K, is given by the equation C/sup 0/psub p/ = -7.55 + 9.352 x 9.352 x 10/sup -2/T - 5.287 x 10/sup -6/ T/sup 2/ cal. deg./sup -1/ mole/sup -1/. The equation B = -279 - 22.6 exp(950/T) cc mole/sup -1/ was derived for the second virial coefficient from calorimetric data. A vibrational assignment which was partly empirical was made and used with molecular structure data to compute thermodynamic functions of the ideal gas to 1500/sup 0/K. The heat, free energy and equilibrium constant of formation at temperatures to 1500/sup 0/ were calculated using appropriate calorimetric data and thermodynamic functions.

• Research Organization: Bureau of Mines, Bartlesville, OK
• OSTI ID: 7305368
• Journal Information: J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 74:18; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
DENSITY
ENERGY
ENTHALPY
ENTROPY
FORMATION HEAT
FREE ENERGY
FURANS
FUSION HEAT
HETEROCYCLIC COMPOUNDS
HIGH TEMPERATURE
INFRARED SPECTRA
LOW TEMPERATURE
MASS SPECTRA
MEDIUM TEMPERATURE
OPTICAL PROPERTIES
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
REACTION HEAT
REFRACTIVITY
SPECIFIC HEAT
SPECTRA
THERMODYNAMIC PROPERTIES
TRANSITION HEAT
TRANSITION TEMPERATURE
ULTRALOW TEMPERATURE
VAPOR PRESSURE
VAPORIZATION HEAT
VERY HIGH TEMPERATURE
VERY LOW TEMPERATURE