Triacetone triperoxide thermogravimetric study of vapor pressure and enthalpy of sublimation in 303–338K temperature range

2011 ◽  
Vol 514 (1-2) ◽  
pp. 37-43 ◽  
Author(s):  
Hilsamar Félix-Rivera ◽  
Michael L. Ramírez-Cedeño ◽  
Rhaisa A. Sánchez-Cuprill ◽  
Samuel P. Hernández-Rivera
Keyword(s):  
Vapor Pressure ◽  
Enthalpy Of Sublimation ◽  
Triacetone Triperoxide ◽  
Temperature Range ◽  
Thermogravimetric Study

scholarly journals The rate of water vapor evaporation from ice substrates in the presence of HCl and HBr: Implications for the lifetime of atmospheric ice particles

2003 ◽  
Vol 3 (3) ◽  
pp. 2179-2218
Author(s):  
C. Delval ◽  
B. Fluckiger ◽  
M. J. Rossi
Keyword(s):  
Activation Energy ◽  
Water Vapor ◽  
Vapor Pressure ◽  
Absorption Spectra ◽  
Mole Fraction ◽  
Enthalpy Of Sublimation ◽  
Experimental Uncertainty ◽  
Temperature Range ◽  
Ice Particles ◽  
Ftir Absorption Spectra

Abstract. Using a multidiagnostic approach the rate Rev or flux Jevof evaporation of H2O and its condensation, kcond, on a 1mm thick ice film have been studied in the temperature range 190 to 240 K as well as in the presence of small amounts of HCl and HBr that left the vapor pressure of H2O on ice unchanged. The resulting Arrhenius expressions with RT in kcal mol-1 for pure ice are Jev=1.6×1028+/−1·exp({−10.3+\\−1.2}/{RT}) [molec cm−2 s−1], kcond=1.7×10−2+\\-1×exp({+1.6+\\−1.5}/{RT}) [s−1], in the presence of an HCl mole fraction in the range 3.2×10−5-6.4×10−3: Jev=6.4×1026+/−1×exp({−9.7+/−1.2}/{RT}) [molec cm−2 s−1], kcond=2.8×10−2+/-1×exp({+1.5+/−1.6}/{RT}) [s−1], and an HBr mole fraction smaller than 6.4×10−3:Jev=7.4×1025+/−1×exp({−9.1+/−1.2}/{RT}) [molec cm−2 s−1], kcond=7.1×10−5+\\−1×exp({+2.6+/−1.5}/{RT}) [s−1]}. The small negative activation energy for H2O condensation on ice points to a precursor mechanism. The corresponding enthalpy of sublimation is DHsubl=Eev-Econd=11.9+/−2.7 kcal mol−1, DHsubl=11.2+/−2.8 kcal mol−1, and DHsubl=11.7+/−2.8 kcal mol−1 whose values are identical within experimental uncertainty to the accepted literature value of 12.3 kcal mol−1. Interferometric data at 633 nm and FTIR absorption spectra in transmission support the kinetic results. The data are consistent with a significant lifetime enhancement for HCl- and HBr-contaminated ice particles by a factor of 3–6 and 10–20, respectively, for submonolayer coverages of HX.

THE ALUMINUM REDUCTION OF MAGNESIUM OXIDE: II. THE VAPOR PRESSURE OF MAGNESIUM OVER THE SYSTEM Al–MgO–CaO

1961 ◽  
Vol 39 (11) ◽  
pp. 2290-2294 ◽  
Author(s):  
K. Grjotheim ◽  
O. Herstad ◽  
J. M. Toguri
Keyword(s):  
Vapor Pressure ◽  
Magnesium Oxide ◽  
Equilibrium Pressure ◽  
Aluminum Reduction ◽  
Temperature Range ◽  
Equilibrium Vapor Pressure

The equilibrium vapor pressure of magnesium over the reaction between the calcined dolomite and aluminum was measured by means of the transportation method. In the temperature range 886–1035 °C, the reaction was found to proceed according to the equilibrium[Formula: see text]and the measured equilibrium pressure of magnesium can be expressed by the equation[Formula: see text]

Influence of Nano-Refrigeration-Oil on Saturated Vapor Pressure of R22

2011 ◽  
Vol 694 ◽  
pp. 309-314 ◽  
Author(s):  
Jiang Feng Lou ◽  
Rui Xiang Wang ◽  
Min Zhang
Keyword(s):  
Experimental Data ◽  
Vapor Pressure ◽  
Mass Fraction ◽  
Saturated Vapor Pressure ◽  
Saturated Vapor ◽  
Experimental Results ◽  
Vapor Pressures ◽  
Temperature Range ◽  
Mass Fractions

The saturated vapor pressures of R22 uniformly mixed with refrigeration oil and nano- refrigeration-oil were measured experimentally at a temperature range from 263 to 333K and mass fractions from 1 to 5%. The experimental results showed that the saturated vapor pressure of R22/KT56 mixture was lower than that of pure R22; the pressure deviation between them increased with a raising mass fraction of refrigeration oil and temperature. After adding nano-NiFe2O4 and nano-fullerene into KT56, the pressure deviation increased at the same mass fraction and temperature. A saturated vapor pressure correlation for R22 and refrigeration oil/nano-refrigeration-oil mixture was proposed, and the calculated values agreed with the experimental data within the deviation of ± 0.77%.

Vapor Pressure of Maleic Anhydride - Temperature Range from 35° to 77°

1949 ◽  
Vol 41 (11) ◽  
pp. 2584-2586 ◽  
Author(s):  
Leon O. Winstrom ◽  
Laurence Kulp
Keyword(s):  
Maleic Anhydride ◽  
Vapor Pressure ◽  
Temperature Range

Application of precise line shape measurements to determine the vapor pressure of ice in the temperature range from 0 to −70° C

2010 ◽  
Author(s):  
K. Bielska ◽  
D. K. Havey ◽  
G. E. Scace ◽  
D. Lisak ◽  
J. T. Hodges ◽  
...  
Keyword(s):  
Vapor Pressure ◽  
Line Shape ◽  
Temperature Range

Static method to measure vapor pressure in the temperature range below 1100 K

1985 ◽  
Vol 56 (12) ◽  
pp. 2306-2309
Author(s):  
Jiro Nishimura ◽  
Takashi Numata ◽  
Hiromitsu Ogasawara ◽  
Yoshio Sakanoue
Keyword(s):  
Vapor Pressure ◽  
Static Method ◽  
Temperature Range

THE VAPOR PRESSURE OF VINYL ACETATE

1933 ◽  
Vol 9 (5) ◽  
pp. 419-423 ◽  
Author(s):  
J. Marsden ◽  
A. C. Cuthbertson
Keyword(s):  
Critical Temperature ◽  
Vapor Pressure ◽  
Vinyl Acetate ◽  
Boiling Point ◽  
Normal Boiling Point ◽  
Temperature Range ◽  
Heat Of Evaporation

This paper presents the results of the measurement of the vapor pressure of vinyl acetate, over the temperature range from 0 °C. to the normal boiling point. The determinations were carried out on vacuum distilled samples with an isoteniscope, differing slightly in detail from that used by Smith and Menzies(7).The normal boiling point is 72.5 °C. The molecular heat of evaporation has been found to be 8211 calories. The equation which represents the results is[Formula: see text]Trouton's constant and the critical temperature have been found to be 23.8 and 228.3 °C.

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