Equations for Vapor Pressures and Latent Heats, including Approximate Equations for Solid Compounds Containing a Gaseous Component

1930 ◽  
Vol 66 (3) ◽  
pp. 153
Author(s):  
Louis J. Gillespie
Keyword(s):  
Vapor Pressures ◽  
Gaseous Component ◽  
Solid Compounds ◽  
Latent Heats ◽  
Approximate Equations

Thermodynamic Studies on Melting Some α- and β-Derivatives of Naphthalene

1979 ◽  
Vol 32 (1) ◽  
pp. 49 ◽  
Author(s):  
SC Khetarpal ◽  
K Lal ◽  
HL Bhatnagar
Keyword(s):  
Melting Point ◽  
Volume Changes ◽  
Electrical Method ◽  
Entropy Of Fusion ◽  
Compressibility Coefficient ◽  
New Apparatus ◽  
Solid Compounds ◽  
Entrapped Air ◽  
Latent Heats ◽  
Derivatives Of

Methods for determining volume changes on melting have been briefly reviewed. A new apparatus has been described which is simple in operation, accurate in measurements and is free from some of the major limitations of the apparatuses used earlier. It has been used to determine volume changes on melting of α- and β-derivatives of naphthalene (C10H7X; X = NH2, OH, COOH), as well as coefficients of cubical expansion of the solid compounds (α) and their melts (α'). The application of the apparatus has been extended to determine the densities of the compounds at any temperature both when entrapped air is present (d) and when it is completely absent (d'). An electrical method using a modified glass calorimeter has been employed for the measurement of latent heats of fusion, ΔHf. From the experimentally determined values of ΔVf/Vs,d', α and ΔHf, the molar volume of the solid compound at the melting point (V8), that of the melt at the melting point (V1), the entropy of fusion (ΔSf), the variation of the melting temperature with pressure [(∂T/∂P)v] and the compressibility coefficient of the solid compounds (β) have been calculated and the results discussed.

VAPOR PRESSURES AND LATENT HEATS FOR THE SYSTEM: BaCl2.8NH3-BaCl2-NH3

1931 ◽  
Vol 53 (8) ◽  
pp. 2978-2983 ◽  
Author(s):  
Louis J. Gillespie ◽  
Eli. Lurie
Keyword(s):  
Vapor Pressures ◽  
Latent Heats

scholarly journals Vapor pressures and latent heats of vaporization of Poly(oxymethylene) Dimethyl Ethers (OME3 and OME4) up to the vicinity of the critical temperature

Fuel ◽  
2021 ◽  
Vol 303 ◽  
pp. 121274
Author(s):  
Michael H. H. Fechter ◽  
Philip Haspel ◽  
Christian Hasse ◽  
Andreas S. Braeuer
Keyword(s):  
Critical Temperature ◽  
Vapor Pressures ◽  
Latent Heats ◽  
Heats Of Vaporization

Scanning electron microscopy of plant cells using a variable-pressure SEM and cryogenic techniques

1993 ◽  
Vol 51 ◽  
pp. 260-261
Author(s):  
M. Yamada ◽  
K. Ueda ◽  
K. Kuboki ◽  
H. Matsushima ◽  
S. Joens
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Saturated Vapor ◽  
Plant Cells ◽  
Variable Pressure ◽  
Specimen Preparation ◽  
Operating Pressure ◽  
Vapor Pressures ◽  
Low Temperature Microscopy ◽  
Scanning Electron

Use of variable Pressure SEMs is spreading among electron microscopists The variable Pressure SEM does not necessarily require specimen Preparation such as fixation, dehydration, coating, etc which have been required for conventional scanning electron microscopy. The variable Pressure SEM allows operating Pressure of 1˜270 Pa in specimen chamber It does not allow microscopy of water-containing specimens under a saturated vapor Pressure of water. Therefore, it may cause shrink or deformation of water-containing soft specimens such as plant cells due to evaporation of water. A solution to this Problem is to lower the specimen temperature and maintain saturated vapor Pressures of water at low as shown in Fig. 1 On this technique, there is a Published report of experiment to have sufficient signal to noise ratio for scondary electron imaging at a relatively long working distance using an environmental SEM. We report here a new low temperature microscopy of soft Plant cells using a variable Pressure SEM (Hitachi S-225ON).

Determination and prediction for vapor pressures of organophosphate flame retardants by gas chromatography

2017 ◽  
Vol 35 (9) ◽  
pp. 1008 ◽  
Author(s):  
Qingzhi Wang ◽  
Hongxia Zhao ◽  
Yan Wang ◽  
Qing Xie ◽  
Jingwen Chen ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Flame Retardants ◽  
Vapor Pressures

Theoretical analysis of counter-current absorption of a poorly soluble gas based on the PDE-AD model

1986 ◽  
Vol 51 (6) ◽  
pp. 1222-1239 ◽  
Author(s):  
Pavel Moravec ◽  
Vladimír Staněk
Keyword(s):  
Experimental Data ◽  
Liquid Phase ◽  
Gas Phase ◽  
Transfer Functions ◽  
Packed Bed ◽  
Packed Bed Column ◽  
Interfacial Transport ◽  
Gaseous Component ◽  
Poorly Soluble ◽  
Counter Current

Expression have been derived in the paper for all four possible transfer functions between the inlet and the outlet gas and liquid steams under the counter-current absorption of a poorly soluble gas in a packed bed column. The transfer functions have been derived for the axially dispersed model with stagnant zone in the liquid phase and the axially dispersed model for the gas phase with interfacial transport of a gaseous component (PDE - AD). calculations with practical values of parameters suggest that only two of these transfer functions are applicable for experimental data evaluation.

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