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Enthalpy / entropy

Steam turbine integration. Figure 6.32 shows a steam turbine expansion on an enthalpy-entropy plot. In an ideal turbine, steam... [Pg.194]

A quantitative theory of rate processes has been developed on the assumption that the activated state has a characteristic enthalpy, entropy and free energy the concentration of activated molecules may thus be calculated using statistical mechanical methods. Whilst the theory gives a very plausible treatment of very many rate processes, it suffers from the difficulty of calculating the thermodynamic properties of the transition state. [Pg.402]

The thermal properties of an ideal gas, enthalpy, entropy and specific heat, can be estimated using the method published by Rihani and Doraiswamy in 1965 ... [Pg.90]

Coefficients of Rihani s and Doraiswamy s method (1965) for calculating enthalpy, entropy, and the for an ideal gas. [Pg.91]

The enthalpy, entropy and free energy changes for an isothennal reaction near 0 K caimot be measured directly because of the impossibility of carrying out the reaction reversibly in a reasonable time. One can, however, by a suitable combination of measured values, calculate them indirectly. In particular, if the value of... [Pg.369]

Using the coordinates of special geometries, minima, and saddle points, together with the nearby values of potential energy, you can calculate spectroscopic properties and macroscopic therm ody-riatriic and kinetic parameters, sncfi as enthalpies, entropies, and thermal rate constants. HyperChem can provide the geometries and energy values for many of these ealeulatiori s. [Pg.32]

LNLRttY ENTHALPY ENTROPY TREE ENERttY HEAT CAPACITY... [Pg.163]

Tables 2,3, and 4 outline many of the physical and thermodynamic properties ofpara- and normal hydrogen in the sohd, hquid, and gaseous states, respectively. Extensive tabulations of all the thermodynamic and transport properties hsted in these tables from the triple point to 3000 K and at 0.01—100 MPa (1—14,500 psi) are available (5,39). Additional properties, including accommodation coefficients, thermal diffusivity, virial coefficients, index of refraction, Joule-Thorns on coefficients, Prandti numbers, vapor pressures, infrared absorption, and heat transfer and thermal transpiration parameters are also available (5,40). Thermodynamic properties for hydrogen at 300—20,000 K and 10 Pa to 10.4 MPa (lO " -103 atm) (41) and transport properties at 1,000—30,000 K and 0.1—3.0 MPa (1—30 atm) (42) have been compiled. Enthalpy—entropy tabulations for hydrogen over the range 3—100,000 K and 0.001—101.3 MPa (0.01—1000 atm) have been made (43). Many physical properties for the other isotopes of hydrogen (deuterium and tritium) have also been compiled (44). Tables 2,3, and 4 outline many of the physical and thermodynamic properties ofpara- and normal hydrogen in the sohd, hquid, and gaseous states, respectively. Extensive tabulations of all the thermodynamic and transport properties hsted in these tables from the triple point to 3000 K and at 0.01—100 MPa (1—14,500 psi) are available (5,39). Additional properties, including accommodation coefficients, thermal diffusivity, virial coefficients, index of refraction, Joule-Thorns on coefficients, Prandti numbers, vapor pressures, infrared absorption, and heat transfer and thermal transpiration parameters are also available (5,40). Thermodynamic properties for hydrogen at 300—20,000 K and 10 Pa to 10.4 MPa (lO " -103 atm) (41) and transport properties at 1,000—30,000 K and 0.1—3.0 MPa (1—30 atm) (42) have been compiled. Enthalpy—entropy tabulations for hydrogen over the range 3—100,000 K and 0.001—101.3 MPa (0.01—1000 atm) have been made (43). Many physical properties for the other isotopes of hydrogen (deuterium and tritium) have also been compiled (44).
The following tables of properties of carbon dioxide are available enthalpy, entropy, and heat capacity at 0 and 5 MPa (0 and 50 atm, respectively) from 273 to 1273 K pressure—volume product (PV), enthalpy, and isobaric heat capacity (C from 373 to 1273 K at pressures from 5 to 140 MPa (50-1,400 atm) (14). [Pg.19]

Generalized charts are appHcable to a wide range of industrially important chemicals. Properties for which charts are available include all thermodynamic properties, eg, enthalpy, entropy, Gibbs energy and PVT data, compressibiUty factors, Hquid densities, fugacity coefficients, surface tensions, diffusivities, transport properties, and rate constants for chemical reactions. Charts and tables of compressibiHty factors vs reduced pressure and reduced temperature have been produced. Data is available in both tabular and graphical form (61—72). [Pg.239]

Extension of Generalized Charts. In 1975, the usehilness of generalized charts was extended upon the pubtication of extensive tables of residual enthalpy, entropy, and heat capacity (82). This tabular data has also been converted into graphical form (3). The corresponding equations incorporate the acentric i2iC. or.PesiduaIenthalpy. [Pg.241]

The overall effieieney of a radial-inflow turbine is a funetion of effieieneies from various eomponents sueh as the nozzle and rotor. A typieal turbine expansion enthalpy/entropy diagram is shown in Figure 8-7. The total enthalpy remains eonstant through the nozzle, sinee neither work nor heat is transferred to or from the fluid. Within the rotor, the total enthalpy ehanges. Downstream of the rotor the total enthalpy remains eonstant. [Pg.325]

Whether AH for a projected reaction is based on bond-energy data, tabulated thermochemical data, or MO computations, there remain some fundamental problems which prevent reaching a final conclusion about a reaction s feasibility. In the first place, most reactions of interest occur in solution, and the enthalpy, entropy, and fiee energy associated with any reaction depend strongly on the solvent medium. There is only a limited amount of tabulated thermochemical data that are directly suitable for treatment of reactions in organic solvents. Thermodynamic data usually pertain to the pure compound. MO calculations usually refer to the isolated (gas phase) molecule. Estimates of solvation effects must be made in order to apply either experimental or computational data to reactions occurring in solution. [Pg.191]

In their original air standard cycle analysis, using constant specific heats, Hawthorne and Davis 4 considered the dry [CBTIiXr cycle. They assumed a perfect heat exchanger, with the specific heats of gas and air constant and identical, so that Ty becomes equal to Tj in Fig. 6.6. From their examination of the enthalpy-entropy diagram of this... [Pg.91]

CAUTION Enthalpy-Entropy charts apply only to the gaseous state, and if a gas is cooled below its dew point, condensation occurs and heat removal cannot be determined directly from the charts. [Pg.386]

Figure 12-13A. Enthalpy-entropy chart for Natural Gas, Sp.Gr. Inc. All rights reserved.)... Figure 12-13A. Enthalpy-entropy chart for Natural Gas, Sp.Gr. Inc. All rights reserved.)...
Brown, G. G., Enthalpy-Entropy Gharts for Natural Gases, Tr. AIMME, Tech Paper No. 1747, July (1944). (See also PIGSMA Engineering Data Book, pp. 104—108 (1957). [Pg.578]

Figure 2-38. Mollier (enthalpy-entropy) diagram for steam. Figure 2-38. Mollier (enthalpy-entropy) diagram for steam.
Absi presLS, psi Temp, dcgF Specific volume Enthalpy Entropy Internal energy... [Pg.232]

The relationship of thermodynamic functions of selective bonding of Hb to a series of carboxylic CP in the variation of the degree of ionization of carboxylic groups is expressed by the effect of enthalpy-entropy compensation (Fig. 18). The compensation effect of enthalpy and entropy components is the most wide-spread characteristic of many reactions in aqueous solutions for systems with a cooperative change in structure [78],... [Pg.30]

When the gas does not behave as an ideal gas, the change in its condition can be followed on a temperature-entropy or an enthalpy-entropy diagram. The intermediate pressures P,i. P 2,. .., are then selected so that the enthalpy change (A//) is the same in each cylinder. [Pg.355]

FIGURE 8.33 On the left of the semipermeable membrane is the pure solvent with its characteristic molar enthalpy, entropy, and Gibbs free energy. On the right is the solution. The molar Gibbs free energy of the solvent is lower in the solution (an entropy effect), and so there is a spontaneous tendency for the solvent to flow into the solution. [Pg.456]


See other pages where Enthalpy / entropy is mentioned: [Pg.87]    [Pg.90]    [Pg.1957]    [Pg.524]    [Pg.411]    [Pg.365]    [Pg.248]    [Pg.518]    [Pg.2000]    [Pg.90]    [Pg.328]    [Pg.30]    [Pg.31]    [Pg.32]    [Pg.369]    [Pg.397]    [Pg.236]    [Pg.1220]    [Pg.426]    [Pg.426]    [Pg.950]    [Pg.967]    [Pg.124]    [Pg.411]    [Pg.413]    [Pg.415]   
See also in sourсe #XX -- [ Pg.61 ]

See also in sourсe #XX -- [ Pg.171 , Pg.175 , Pg.184 ]

See also in sourсe #XX -- [ Pg.74 , Pg.164 , Pg.178 , Pg.189 , Pg.245 , Pg.247 , Pg.249 , Pg.250 , Pg.283 , Pg.290 , Pg.303 , Pg.304 , Pg.307 , Pg.309 , Pg.473 , Pg.480 , Pg.485 ]




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A Theoretical Approach to Enthalpy-Entropy Compensation in Molecular Recognition

Activation: enthalpy, entropy

Adsorption Enthalpies and Entropies

Comparison with Enthalpy and Entropy

Compensation behavior enthalpy-entropy relationship

Compensation between Enthalpy and Entropy

Competition between enthalpy and entropy

Conditions of entropy-enthalpy compensation

Cyclodextrin inclusion-complexes, enthalpy-entropy

Cyclodextrins enthalpy-entropy compensation

Determination of enthalpy and entropy

Drug-receptor interactions enthalpy/entropy compensation

Energy, enthalpy and entropy

Enthalpies and entropies of reaction for Th(IV) fluoride complexes

Enthalpy - pressure - temperature - entropy diagrams

Enthalpy and Entropy Changes on Mixing

Enthalpy and Entropy Contributions

Enthalpy and Entropy of Formation

Enthalpy and Entropy of Micellization

Enthalpy and Entropy of Transformation

Enthalpy and entropy

Enthalpy and entropy changes

Enthalpy and entropy control

Enthalpy and entropy of activation

Enthalpy and entropy of adsorption

Enthalpy and entropy of fusion

Enthalpy and entropy of micellisation

Enthalpy and entropy terms

Enthalpy entropy diagrams

Enthalpy entropy interplay

Enthalpy, Entropy, and the Laws of Thermodynamics

Enthalpy, entropy and free energy of formation

Enthalpy-entropy compensation

Enthalpy-entropy compensation conclusion

Enthalpy-entropy compensation cooperative effect

Enthalpy-entropy compensation effect

Enthalpy-entropy compensation effect, molecular recognition

Enthalpy-entropy compensation plots

Enthalpy-entropy compensation recognition

Enthalpy-entropy compensation relationship

Enthalpy-entropy compensation temperature

Enthalpy-entropy compensation thermodynamics

Enthalpy-entropy compensation viewed from

Enthalpy-entropy compensation weak interaction

Enthalpy-entropy compensation, for

Enthalpy-entropy relationship

Enthalpy/entropy computation

Enthalpy/entropy departure functions

Enthalpy/entropy diagram for

Entropy and Enthalpy Corrections

Entropy/enthalpy diagram, combustion

Estimation of Change in Enthalpy, Entropy, and Gibbs Function for Ideal Gases

Free energy enthalpy and entropy

Functional groups enthalpy/entropy compensation

Gibbs energy change enthalpy and entropy

Gibbs energy enthalpy and entropy

Grunwald theory, enthalpy-entropy

Guest solvation enthalpy-entropy compensation

Heat Capacity, Enthalpy, and Entropy

Heat Capacity, Incremental Enthalpy, Entropy

Hydration enthalpy and entropy

Interplay of enthalpy and entropy

Mixing, enthalpy entropy

Mixing, entropy free enthalpy

Molecular enthalpy-entropy compensation

Mollier enthalpy-entropy diagram

Partial adsorption enthalpy and entropy

Partial molal enthalpies and entropies

Partial molar quantities enthalpy, entropy, volume)

Quenching enthalpy/entropy

Residual enthalpy and entropy

Standard enthalpy and entropy

Standard enthalpy entropy

Standard entropy, heat capacity and enthalpy of formation

Standard molar Gibbs energies, enthalpies and entropies

Temperature dependence of hydrophobicity enthalpy versus entropy stabilizations

Temperature entropy/enthalpy effects

The Enthalpy and Entropy of Adsorption

Thermodynamics entropy and enthalpy profiles

Thermodynamics of DNA-helix formation Correlation between enthalpy and entropy changes

Values for cellular enthalpy, entropy, and free energy of formation

Vaporization, enthalpy/entropy

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