Data for density

Gerlaeh2 gave the following data for densities at 15° C., the concentrations being expressed in parts of As205 in 100 parts of solution ... 

As in the preceding chapters, data for densities and phase transitions are also provided. The discussion of these properties in Chapter 1 applies here also. 

FIGURE 18.2 SS-25 and DI water blend data for density and wt% solids. 

Figure 4. Comparison between the density enhancement in pure SCF CHF3 and density enhancement in SCR mixtures CHF3 + pyrene ( ) calculated from experimental data T = 310.8—311.5 K) for pure CHF3, (O) experimental data " for the system CHF3 + pyrene (F = 303 K and X2 = 5x10 ),(x) experimental data for the system CHF3 + pyrene (J = 303 K and X2 = 3 x 10 ). For this solvent (CHF3) there are no data for densities lower than 0.004. However, the experimental data for pure SCF Ar indicate a shape of the curve very similar to the experimental curves for the mixture CHF3 + pyrene over the entire range of densities.

Experimental data for densities and enthalpies of electrolyte solntions are fonnd in some compilations [75, 78] and in the ELDAR database [76]. The book by Zaytsev and Aseyev [74] contains extensive tables based on smoothed experimental resnlts some cantion is needed with snch tables becanse smoothing procednres can introdnce artifacts. The CRC Handbook of Chemistry and Physics [26] also contains density data for many electrolytes in water at 20°C. 

Figure 7 [106] shows the main lines of the phase diagram for adsorbed He proposed by Greywall on the basis of its heat capacity data. For densities fi-om 4 and 6.7 atoms/nm, the... 

FIG. 9 Segment density for bimodal distribntian function with chain length N = A9 and N = 9S for values of surface coverage 0.12 (1), 0.08 (2), and 0.04 (3). The hroken lines correspond to data for density profiles for monodisperse chains with N = 49. (From Ref. 40.)... 

Properties including freezing point, boiling point, and flash point of methanol-water solutions of different methanol contents have been given by Flick [14]. Data for density [14,29], viscosity [14], vapor pressure [14,29], thermal conductivity [14], specific heat [14,29], surface tension [30], and refractive index [31] at selected temperatures have also been tabulated. Heat of mixing can be found in Reference 32. Diffusion coefficients of methanol and water in methanol-water solutions have been evaluated in detail by Derlacki et al. [33]. 

Compilation of data for binary mixtures reports some vapor-liquid equilibrium data as well as other properties such as density and viscosity. 

Barnes and Hunter [290] have measured the evaporation resistance across octadecanol monolayers as a function of temperature to test the appropriateness of several models. The experimental results agreed with three theories the energy barrier theory, the density fluctuation theory, and the accessible area theory. A plot of the resistance times the square root of the temperature against the area per molecule should collapse the data for all temperatures and pressures as shown in Fig. IV-25. A similar temperature study on octadecylurea monolayers showed agreement with only the accessible area model [291]. 

At present, the data base used for the fit was not specially selected to avoid homologous proteins. Thus, a further improvement can be expected from using data for one of the specially prepared lists of PDB files (cf. Hobohm et al. [9]). We also expect further improvements from replacing the polynomial fits in the potential estimation procedure by piecewise cubic fits though at the moment it is not clear how to select the number of nodes needed to get a good but not overfitting approximation to the density. Finally, we are considering... 

The primary process of SiH decomposition is electron impact which produces a large number of different neutral and ionic species as shown in Table 1. The density of S1H2 and SiH neutral species produced has been found to be much larger than the density of the ions. For example, mass spectrometric data for silane discharges indicate that the density of ionic species is lower by 10 compared with the density of neutral species. Further, mass spectrometer signals of ionic species, such as SiH SiH 25 SiH", SiH", and Si2H , increase by more than two orders of magnitude as the r-f power is increased, eg, from 2 to 20 W. A rapid rise in the population of ions, with power, implicitly means an increase in electron density. 

Barrier Properties. VinyUdene chloride polymers are more impermeable to a wider variety of gases and Hquids than other polymers. This is a consequence of the combination of high density and high crystallinity in the polymer. An increase in either tends to reduce permeabiUty. A more subtle factor may be the symmetry of the polymer stmcture. It has been shown that both polyisobutylene and PVDC have unusually low permeabiUties to water compared to their monosubstituted counterparts, polypropylene and PVC (88). The values Hsted in Table 8 include estimates for the completely amorphous polymers. The estimated value for highly crystalline PVDC was obtained by extrapolating data for copolymers. 

K, have been tabulated (2). Also given are data for superheated carbon dioxide vapor from 228 to 923 K at pressures from 7 to 7,000 kPa (1—1,000 psi). A graphical presentation of heat of formation, free energy of formation, heat of vaporization, surface tension, vapor pressure, Hquid and vapor heat capacities, densities, viscosities, and thermal conductivities has been provided (3). CompressibiHty factors of carbon dioxide from 268 to 473 K and 1,400—69,000 kPa (203—10,000 psi) are available (4). 

Azetidine (1) is a colourless, mobile liquid, b.p. 62.5 C/747 mmHg (56JA4917), which is completely miscible with water. Its density 4 = 0.8412 and refractive index d = 1.4278 (37HCA109). Table 1 gives b.p. and m.p. data for other representative azetidines. 

A key limitation of sizing Eq. (8-109) is the limitation to incompressible flmds. For gases and vapors, density is dependent on pressure. For convenience, compressible fluids are often assumed to follow the ideal-gas-law model. Deviations from ideal behavior are corrected for, to first order, with nommity values of compressibihty factor Z. (See Sec. 2, Thvsical and Chemical Data, for definitions and data for common fluids.) For compressible fluids... 

TABLE 25-51 Typical Density and Moisture-Content Data for Domestic, Commercial, and Industrial Solid Waste... 

As further discussed in several review articles on shock compression (Al tshuler, 1965 Davison and Graham, 1979 McQueen et al., 1970), Hugoniot data for many condensed media may be described over varying ranges of pressure and density in terms of a linear relation of shock and particle velocity. 

Let us now examine its values for some materials. Data for E we can take from Table 3.1 in Chapter 3 those for density, from Table 5.1 in Chapter 5. The resulting values of the index are as shown in Table 7.1. 

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