摘要:

A great deal of solution chemistry can be summarized in a table of standard electrode potentials of the elements in the solvent of interest. In this work, standard electrode potentials and temperature coefficients in water at 298.15 K, based primarily on the ‘‘NBS Tables of Chemical Thermodynamic Properties,’’ are given for nearly 1700 half‐reactions atpH=0.000 andpH=13.996. The data allow the calculation of the thermodynamic changes and equilibrium constants associated with ∼1.4 million complete cell reactions over the normal temperature range of liquid water. Estimated values are clearly distinguished from experimental values, and half‐reactions involving doubtful chemical species are duly noted. General and specific methods of estimation of thermodynamic quantities are summarized.

ISSN:0047-2689    

DOI:10.1063/1.555839

出版商:AIP    

年代:1989

数据来源: AIP

摘要:

Data have been compiled on the cross sections for collisions of electrons and photons with oxygen molecules (O2). For electron collisions, the processes included are: total scattering, elastic scattering, momentum transfer, excitations of rotational, vibrational, and electronic states, dissociation, ionization, and attachment. Ionization and dissociation processes are considered for photon impact. Cross‐section data selected are presented graphically. Spectroscopic and other properties of the oxygen molecule are summarized for understanding of the collision processes. The literature was surveyed through August 1987, but some more recent data are included when available to the authors.

ISSN:0047-2689    

DOI:10.1063/1.555841

出版商:AIP    

年代:1989

数据来源: AIP

摘要:

Thermal conductivities of refrigerant 12 (dichlorodifluoromethane), refrigerant 113 (1,1,2‐trichloro‐1,2,2‐trifluoroethane), refrigerant 114 (1,2‐dichloro‐1,1,2,2‐tetrafluoroethane), and refrigerant C318 (perfluorocyclobutane) were critically evaluated and correlated on the basis of a comprehensive literature survey. Recommended values were established for a wide range of temperatures and pressures, extending up to three times the critical density and excluding the critical region. Using the residual concept, a dilute‐gas function and an excess function of simple form were developed for each refrigerant. The average accuracy obtained is ∼6%.

ISSN:0047-2689    

DOI:10.1063/1.555842

出版商:AIP    

年代:1989

数据来源: AIP

摘要:

The tables in our first paper on polycyclic aromatic hydrocarbons [J. Phys. Chem. Ref. Data17, 241 (1988)] have been extended by calculating thermodynamic properties for the first four isomer groups in the pyrene series, the first three isomer groups in the naphthopyrene series, and the first three isomer groups in the coronene series. Successive isomer groups in each series differ by C4H2. Since chemical thermodynamic properties are known for only a limited number of polycyclic aromatic hydrocarbons, the properties of individual species have been estimated using Benson group values of Stein and Fahr for temperatures from 298.15 to 3000 K. Values ofC○P,S°, &Dgr;fH°, and &Dgr;fG° have been calculated in joules for a standard state pressure of 1 bar. The chemical thermodynamic properties of the individual species have also been calculated. The isomer group values provide a basis for extrapolating to higher carbon numbers where it is not feasible to consider individual molecular species.

ISSN:0047-2689    

DOI:10.1063/1.555826

出版商:AIP    

年代:1989

数据来源: AIP

摘要:

Experimental cross sections forK‐shell x‐ray production by hydrogen and helium ions (Z1=1,2) in target atoms from beryllium to uranium (Z2=4–92 ) are tabulated as compiled (7418 cross sections) from the literature (161 references were found) with the search for the data terminated in January 1988. These cross sections are compared with predictions of the first Born approximation and ECPSSR theory for inner‐shell ionization. The ECPSSR accounts for the energy loss (E) and Coulomb deflection (C) of the projectile ion as well as for the perturbed stationary state (PSS) and relativistic (R) nature of the target’s inner‐shell electron.primafacieattributed to inadequacies of a screened hydrogenic description for theK‐shell electron.

ISSN:0047-2689    

DOI:10.1063/1.555838

出版商:AIP    

年代:1989

数据来源: AIP

摘要:

The rate constants for the quenching of the excited states of metal ions and complexes in homogeneous fluid solution are reported in this compilation. Values ofkqfor dynamic, collisional processes between excited species and quenchers have been critically evaluated, and are presented with the following information, among others, from the original publications, when available: description of the solution medium, temperature at whichkqwas determined, experimental method, range of quencher concentration used, lifetime of the excited state in the absence of quencher, activation parameters, quenching mechanism. Data collection is complete through the end of 1986, and covers the coordination compounds of 26 metals, including the ions and complexes of the inner‐ and outer‐transition metals, and porphyrin complexes of nontransition metals. Data for 261 excited states quenched by more than 400 inorganic quenchers and 600 organic quenchers have been extracted from almost 500 publications. The introduction to the work contains a discussion of the conceptual background to quenching, including a general treatment of the kinetics, an explanation of the tables, and a list of recent review articles. Uncommon kinetics mechanisms and equations, used to obtain the reported values ofkq, are discussed in detail as part of the notes to the tables. Indexes of excited states, quenchers, and authors are appended.

ISSN:0047-2689    

DOI:10.1063/1.555840

出版商:AIP    

年代:1989

数据来源: AIP

ISSN:0047-2689    

DOI:10.1063/1.555824

出版商:AIP    

年代:1989

数据来源: AIP

ISSN:0047-2689    

DOI:10.1063/1.555825

出版商:AIP    

年代:1989

数据来源: AIP