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Liquid pressure dependence

This can be directly related to the liquid pressure depending on what equation or approach Is used. [Pg.463]

Figure 4.2 Pressure in gases and liquids. Each container has four pressure gauges, one on top, one on bottom, and two on the side. Note how the four gauges on the gas container all read the same pressure, but the liquid gauges show that pressure increases with increasing depth. Gas pressures are exerted uniformly in all directions liquid pressures depend on the depth of the liqnid. [Pg.97]

In addition to the surface area of the particles, several other parameters have some influence on the necessary resin consumption, e.g. the type of the boards, thickness of the sanding zone, type and capacity of the blenders, separation and spraying of the glue resin (only wiping effect or spraying of the resin by air or liquid pressure), shape of the panicles for the same particle sizes, dependence of... [Pg.1086]

Because flashing steam-condensate lines represent two-phase flow, with the quantity of liquid phase depending on die system conditions, these can be designed following the previously described two-phase flow methods. An alternate by Ruskin [28] uses the concept but assumes a single homogeneous phase of fine liquid droplets dispersed in the flashed vapor. Pressure drop was calculated by the Darcy equation ... [Pg.141]

Face lubricated-type seals must be connected from the source of lubrication to the tap openings in the seal gland before startup. This is another predetermined environmental control feature that is mandatory for proper seal function. Where double seals are to be operated, it is necessary that the lubrication feed lines be connected to the proper ports for both circulatory or dead-end systems before equipment startup. This is very important because all types of double seals depend on the controlled pressure and flow of the sealing fluid to function properly. Even before the shaft is rotated, the sealing liquid pressure must exceed the product pressure opposing the seal. Be sure a vapor trap does not prevent the lubricant from reaching the seal face promptly. [Pg.953]

The temperature at which a liquid boils depends on the pressure above it. To understand why this is the case, consider Figure 9.3 (p. 231). This shows vapor bubbles rising in a boiling liquid. For a vapor bubble to form, the pressure within it, Plt must be at least equal to the pressure above it, P2. Because P1 is simply the vapor pressure of the liquid, it follows that a liquid boils at a temperature at which its vapor pressure is equal to the pressure above its surface. If this pressure is 1 atm (760 mm Hg), the temperature is referred to as the normal... [Pg.230]

For liquid mixtures at low pressures, it is not important to specify with care the pressure of the standard state because at low pressures the thermodynamic properties of liquids, pure or mixed, are not sensitive to the pressure. However, at high pressures, liquid-phase properties are strong functions of pressure, and we cannot be careless about the pressure dependence of either the activity coefficient or the standard-state fugacity. [Pg.155]

Dill J. F., Litovitz T. A., Bucaro J. A. Molecular reorientation in liquids by Rayleigh scattering pressure dependence of rotational correlation functions, J. Chem. Phys. 62, 3839-50 (1975). [Pg.285]

Fig. 8.12a,b The effect of gravity on inlet liquid pressure and pressure difference between the inlet and outlet cross-section of the capillary (a) the dependence of (g), (b) the dependence of AP(g), (AP = — Pout). Reprinted from Peles et al. (2000) with permission... [Pg.373]

The viscosity of a liquid is dependent on pressure as well as temperature, but the effect is not significant except at very high pressures. A rise in pressure of 300 bar is roughly equivalent to a decrease in temperature of 1°C. [Pg.319]

Fig. 1.6 The correlation between the bubble temperature at the collapse and the amount of the oxidants created inside a bubble per collapse in number of molecules. The calculated results for various ambient pressures and acoustic amplitudes are plotted. The temperature of liquid water is 20 °C. (a) For an air bubble of 5 pm in ambient radius at 140 kHz in ultrasonic frequency, (b) For an oxygen bubble of 0.5 pm in ambient radius at 1 MHz. Reprinted with permission from Yasui K, Tuziuti T, Iida Y, Mitome H (2003) Theoretical study of the ambient-pressure dependence of sonochemical reactions. J Chem Phys 119 346-356. Copyright 2003, American Institute of Physics... Fig. 1.6 The correlation between the bubble temperature at the collapse and the amount of the oxidants created inside a bubble per collapse in number of molecules. The calculated results for various ambient pressures and acoustic amplitudes are plotted. The temperature of liquid water is 20 °C. (a) For an air bubble of 5 pm in ambient radius at 140 kHz in ultrasonic frequency, (b) For an oxygen bubble of 0.5 pm in ambient radius at 1 MHz. Reprinted with permission from Yasui K, Tuziuti T, Iida Y, Mitome H (2003) Theoretical study of the ambient-pressure dependence of sonochemical reactions. J Chem Phys 119 346-356. Copyright 2003, American Institute of Physics...
The design of propellants for solid fuel rockets differs considerably from that for ordnance, because of the lower operating pressures, usually below 15 MPa. To understand the principles involved it is first necessary to give a brief account of rocket propulsion. In this account considerations will be restricted to motors based on solid propellants. Motors based on liquid fuels, such as petroleum fractions and liquid oxygen, depend on combustion processes of non-explosive type. [Pg.188]

In order to properly account for the effect of pressure on liquid phase reaction rates one should eliminate the pressure dependence of the concentration terms by expressing the latter in terms of mole ratios. It is then customary to express the general dependence of the rate... [Pg.219]

If the pressure dependence of the molar volume of the liquid is neglected, integration from a flat interface (r = oo) yields... [Pg.176]

Blackmond et al. investigated the influence of gas-liquid mass transfer on the selectivity of various hydrogenations [39]. It could be shown - somewhat impressively - that even the pressure-dependence of enantioselectivity of the asymmetric hydrogenation of a-dehydroamino acid derivatives with Rh-catalysts (as described elsewhere [21b]) can be simulated under conditions of varying influence of diffusion These results demonstrate the importance of knowing the role of transport phenomena while monitoring hydrogenations. [Pg.266]

H (MPa) (Eq. (13)) and HA (MPa m3 mor1) (Eq. (14)) are often referred to as Henry s constant , but they are in fact definitions which can be used for any composition of the phases. They reduce to Henry s law for an ideal gas phase (low pressure) and for infinitely dilute solution, and are Henry s constant as they are the limit when C qL (or xA) goes to zero. When both phases behave ideally, H depends on temperature only for a dilute dissolving gas, H depends also on pressure when the gas phase deviates from a perfect gas finally, for a non-ideal solution (gas or liquid), H depends on the composition. This clearly shows that H is not a classical thermodynamic constant and it should be called Henry s coefficient . [Pg.1523]

The effects of pressure on the phase transition of liquid water to ice (and within the ice phase itself) are complicated by the formation of several pressure-dependent ice polymorphs (Chaplin, 2004 Franks, 1984, 2000 Kalichevsky et al., 1995 Ludwig, 2001). Thirteen crystalline forms of ice have been reported to date Ih (hexagonal or normal or regular ice), Ic (cubic... [Pg.14]


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See also in sourсe #XX -- [ Pg.288 ]




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