The energy of reaction of liquid trinitrofluoromethane with diethyl oxalate as fuel was determined in a rotating bomb calorimeter. The standard heat of formation, which is -51.99 ± 0.48 kcál. per mole (±0.48 is estimated standard deviation of the mean), at °C. was calculated using a computer program which has been developed for compounds containing C, H, O, N( F, Cl, Br). The effect of temperature on density, vapor pressure, and surface tension of the compound was determined for a given temperature range. The equations relating these properties to the temperature are given. For better characterization, several other properties, such as freezing and boiling point, refractive index, and heat capacity were also measured and are reported.
The enthalpy of formation of bis(2-fluoro-2,2-dinitroethyl)amine was determined by combustion calorimetry using a platinum-lined rotating-bomb calorimeter. To desensitize and ensure complete combustion, the compound was burned with an auxiliary material, diethylphthalate. The enthalpy of formation (c,298.15°K) was determined to be -126.952 ± 0.49 kcal/mol.The enthalpy of formation of bis(2-fluoro-2,2-dinitroethy])amine (BFDNA) was determined by combustion calorimetry, using a platinum-lined rotating-bomb calorimeter. A mixture of approximately 55/45 wt % of BFDNA to diethylphthalate (DEP) was burned in an oxygen atmosphere (30 atm pressure). After a series of preliminary runs on a Parr stationary adiabatic-bomb calorimeter, this ratio was selected to produce a smooth and clean combustion. Since BFDNA was considered shock sensitive, the DEP also served as a desensitizer. The enthalpy of formation (d, 298.15°K) was determined from the following idealized equation at 1 atm: C4H508N5F2(c) + 0.75 02(g) + 118.5 H20(1) -4 C02(g) + 2 HF 60 H20(1) + 2.5 N2(g) EXPERIMENTAL Apparatus. The combustion experiments were carried out in a platinum-lined rotating-bomb calorimeter, built according to a design of the Bureau of Mines, Bartlesville, Okla. ( 7). The modifications to the original instrumentation, and the basic procedure were as previously reported (16)
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