A new calorimeter for determination of the temperature dependence of heat of vaporization

1978 ◽  
Vol 43 (5) ◽  
pp. 1313-1324 ◽  
Author(s):  
Vladimír Majer ◽  
Václav Svoboda ◽  
Vladimír Hynek ◽  
Jiří Pick
Keyword(s):  
Temperature Dependence ◽  
Heat Of Vaporization

Temperature dependence of heats of vaporization of saturated hydrocarbons C5-C8; Experimental data and an estimation method

1979 ◽  
Vol 44 (3) ◽  
pp. 637-651 ◽  
Author(s):  
Vladimír Majer ◽  
Václav Svoboda ◽  
Slavoj Hála ◽  
Jiří Pick
Keyword(s):  
Experimental Data ◽  
Temperature Dependence ◽  
Estimation Method ◽  
Saturated Hydrocarbons ◽  
Heat Of Vaporization ◽  
Temperature Range ◽  
Entropy Of Vaporization ◽  
Heats Of Vaporization

Heats of vaporization of a group of 10 alkanes C6-C8 and 2 cycloalkanes were measured in a temperature range of 25-80 °C. By combining the obtained results with selected literature data, a set of very accurate values of heats of vaporization as functions of temperature was made up for 22 saturated C5-C8 hydrocarbons. This set was employed for the verification of the proposed estimation method for the determination of heat of vaporization which is based on the principle of combination of a contribution method with constant entropy-of-vaporization rules. In this way it is then possible to estimate heats of vaporization of C4-C9 alkanes with an error lower than 0.5%.

Determination of Temperature Dependence of Kerr Constant for Nematic Liquid Crystal

2011 ◽  
Vol 544 (1) ◽  
pp. 227/[1215]-231/[1219] ◽  
Author(s):  
M. H. Majles Ara ◽  
S. H. Mousavi ◽  
M. Rafiee ◽  
M. S. Zakerhamidi
Keyword(s):  
Liquid Crystal ◽  
Temperature Dependence ◽  
Nematic Liquid Crystal ◽  
Kerr Constant

A neutron powder diffraction determination of the thermal expansion tensor of crocoite (PbCrO4) between 60 K and 290 K

1996 ◽  
Vol 60 (403) ◽  
pp. 963-972 ◽  
Author(s):  
Kevin S. Knight
Keyword(s):  
Thermal Expansion ◽  
Temperature Dependence ◽  
Powder Diffraction ◽  
Maximum Expansion ◽  
Lattice Constants ◽  
Thermal Expansion Tensor ◽  
Diffraction Determination ◽  
Line Passing ◽  
Neutron Time

AbstractThe thermal expansion tensor of crocoite has been determined from high-resolution neutron time-of-flight powder diffraction data. The temperature dependence of the lattice constants between 4.5 K and 290 K have been fitted to a quasi-harmonic Einstein model, and the temperature dependence of the thermal expansion tensor has been calculated for 60 K ≤ T ≤ 290 K. The magnitudes of the principal expansivities and their orientation exhibit saturation behaviour for temperatures above 300 K. The predicted saturated expansion coefficients are α11 = 33.1(1) × 10−6K−1, α22 = 15.72(3) × 10−6K−1, α33 = 3.36(1) × 10−6K−1, with α22 parallel to b and α11 lying at an angle of −37.86(5)° to c for the P21/n setting of the crystal structure. The direction of maximum expansion is approximately parallel to both and the least-squares line passing through the projection of the chromium atoms on (010). The direction of minimum expansion lies approximately parallel to [101]. No evidence was found for either a structural or magnetic phase transition between 4.5 K and 300 K.

The direct determination of the temperature dependence of the refractive index of liquids and solids

1976 ◽  
Vol 9 (14) ◽  
pp. 1945-1951 ◽  
Author(s):  
G Abbate ◽  
A Attanasio ◽  
U Bernini ◽  
E Ragozzino ◽  
F Somma
Keyword(s):  
Refractive Index ◽  
Temperature Dependence ◽  
Direct Determination

scholarly journals Gas chromatographic determination of liquid vapour pressure and heat of vaporization of tetrachlorobenzyltoluenes

1996 ◽  
Vol 727 (2) ◽  
pp. 265-273 ◽  
Author(s):  
Anniek G. van Haelst ◽  
Frans W.M. van der Wielen ◽  
Harrie A.J. Govers
Keyword(s):  
Vapour Pressure ◽  
Chromatographic Determination ◽  
Heat Of Vaporization

Determination of the vapour pressure temperature dependence of californium hexafluoroacetylacetonate adducts

1989 ◽  
Vol 136 (6) ◽  
pp. 405-409 ◽  
Author(s):  
M. I. Aizenberg ◽  
E. V. Fedoseev ◽  
S. S. Travnikov ◽  
A. V. Davydov ◽  
B. F. Myasoedov
Keyword(s):  
Temperature Dependence ◽  
Vapour Pressure
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