Chemical thermodynamic properties of 2-methylthiophene

Journal Article · Sun May 20 04:00:00 EDT 1956 · J. Am. Chem. Soc.; (United States)

DOI:https://doi.org/10.1021/ja01591a008· OSTI ID:7305379

Pennington, R E; Finke, H L; Hubbard, W N; Messerly, J F; Frow, F R; Hossenlopp, I A; Waddington, G

Calorimetric studies of 2-methylthiophene in the temperature range 12 to 473/sup 0/K yielded the following information: values of heat capacity for the solid, the liquid (C/sub satd/ = 45.85 - 0.1754 T + 6.772 x 10/sup -4/T/sup 2/ - 6.771 x 10/sup -7/T/sup 3/, cal. deg./sup -1/ mole/sup -1/ (213 to 344/sup 0/K)), and the vapor (C/sup 0//sub p/ = -1.745 + 9.562 x 10/sup -2/T - 4.420 x 10/sup -5/T/sup 2/, cal. deg./sup -1/ mole/sup -1/ (375 to 473/sup 0/K)); the heat of fusion (2263 cal. mole/sup -1/) at the triple point (209.79 +- 0.05/sup 0/K); the entropy in the liquid state at 298.16/sup 0/K (52.22 cal. deg./sup -1/ mole/sup -1/); the heat of vaporization (..delta..H/sub v/ = 11651 - 3.937 T - 1.364 x 10/sup -2/T/sup 2/, cal. mole/sup -1/ (343 to 385/sup 0/K)); the second virial coefficient in the equation of state PV = RT(1 + B/V)(B = 114 - 127 exp (900/T), cc mole/sup -1/ (343 to 473/sup 0/K)); and the standard heat of formation of the liquid from graphite, hydrogen and rhombic sulfur (..delta..Hf/sup 0//sub 298.16/ = 10.86 +- 0.21 kcal. mole/sup -1/). Tables of thermodynamic properties for the solid and liquid states (10 to 340/sup 0/K) were computed. The calorimetrically determined properties of the vapor were used with spectroscopic and molecular structure data to evaluate the height of the barrier hindering internal rotation (900 cal. mole/sup -1/) and to compute tables of the chemical thermodynamic properties at selected temperatures from 0 to 1000/sup 0/K.

• Research Organization: Bureau of Mines, Bartlesville, OK
• OSTI ID: 7305379
• Journal Information: J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 78; 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)
ENTHALPY
ENTROPY
FLUIDS
FORMATION HEAT
FUSION HEAT
GASES
HETEROCYCLIC COMPOUNDS
HIGH TEMPERATURE
LIQUIDS
LOW TEMPERATURE
MEDIUM TEMPERATURE
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PHYSICAL PROPERTIES
REACTION HEAT
SOLIDS
SPECIFIC HEAT
THERMODYNAMIC PROPERTIES
TRANSITION HEAT
ULTRALOW TEMPERATURE
VAPORIZATION HEAT
VERY HIGH TEMPERATURE
VERY LOW TEMPERATURE