Nitromethane: the vapor heat capacity, heat of vaporization, vapor pressure, and gas imperfection; the chemical thermodynamic properties from 0 to 1500/sup 0/K

Journal Article · Tue Oct 05 04:00:00 UTC 1954 · J. Am. Chem. Soc.; (United States)

DOI:https://doi.org/10.1021/ja01648a008· OSTI ID:7319826

McCullough, J P; Scott, D W; Pennington, R E; Hossenlopp, I A; Waddington, G

Because nitromethane is important both as an industrial chemical and, from a theoretical standpoint, as the simplest member of the family of nitroparaffins, measurements were made of several of its thermodynamic properties. The properties studied were: (1) the vapor pressure at 15 temperatures from 55 to 136/sup 0/ (log/sub 10/ p(mm) = 7.28050 - 1446.186/(t + 227.515); t in /sup 0/C); (2) the heat of vaporization at 4 temperatures from 318 to 374/sup 0/K. (..delta..H/sub v/ = 11.730 - 4.9977 T - 1.2400 x 10/sup -2/T/sup 2/ cal. mole/sup -1/); and (3) the vapor heat capacity at 2 to 4 pressures at each of 6 temperatures from 363 to 523/sup 0/K. (C/sup 0//sub p/ = 2.352 + 4.2882 x 10/sup -2/ T - 1.694 x 10/sup -5/T/sup 2/, cal. deg./sup -1/ mole/sup -1/). The observed effects of gas imperfection on the thermodynamic properties were correlated with the equation of state, PV = RT(1 + B/V), where B = -300 - 12.97 exp (1700/T) cc. mole/sup -1/. The results of these studies and the entropy and heat of formation data reported by other investigators provide relatively complete and highly accurate experimental thermodynamic data for nitromethane. These data form a sound basis for computing the chemical thermodynamic properties by appropriate methods of statistical mechanics and thermodynamics. Values of the following properties were computed at selected temperatures from 0 to 1500/sup 0/K: (F/sup 0/ - H/sub 0//sup 0/)/T, (H/sup 0/ - H/sub 0//sup 0/)/T, H/sup 0/ - H/sub 0//sup 0/, S/sup 0/, C/sup 0//sub p/, ..delta..H/sup 0//sub f/, ..delta..F/sup 0//sub f/ and log/sub 10/ K/sub f/.

• Research Organization: Bureau of Mines, Bartlesville, OK
• OSTI ID: 7319826
• Journal Information: J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 76; 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)
CHEMICAL EXPLOSIVES
ENTHALPY
ENTROPY
EXPLOSIVES
FORMATION HEAT
HIGH TEMPERATURE
LOW TEMPERATURE
MEDIUM TEMPERATURE
NITRO COMPOUNDS
NITROMETHANE
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHYSICAL PROPERTIES
REACTION HEAT
SPECIFIC HEAT
THERMODYNAMIC PROPERTIES
TRANSITION HEAT
ULTRALOW TEMPERATURE
VAPOR PRESSURE
VAPORIZATION HEAT
VERY HIGH TEMPERATURE
VERY LOW TEMPERATURE