摘要:

The data obtained by Maass and Geddes (7) on the properties of ethylene in the critical-temperature–critical-pressure region have been substantiated although it was shown that a small correction had to be applied to their absolute values of density. It was shown that at the critical density of ethylene the difference between the densities of the medium below and above the point at which the meniscus disappeared was a maximum. The conclusion of Mayer and Harrison (made in their recent papers on statistical mechanics of condensing systems (6, 10)) that, at a temperature just above that at which the meniscus disappeared, the pressure of the system remains constant over a considerable variation of mass per volume, has been corroborated. The effect of the presence of small measured quantities of air has been examined. The phenomena observed are explained on the basis that there is a difference between the gaseous and liquid states of aggregation with a structure assigned to the latter.

ISSN:1923-4287    

DOI:10.1139/cjr38b-038

出版商:NRC Research Press    

年代:1938

数据来源: NRC

摘要:

An investigation of the mercury photosensitized decomposition of ethane has been made, a continuous flow system being used. Under these circumstances, in the absence of secondary reactions, it is found that there is considerable production of hydrogen. It is therefore concluded that the primary step in the reaction is a C—H bond split.The mechanism of the reaction is discussed in detail, and it is concluded that the processes occurring, both with and without added hydrogen, are:It is also concluded from a discussion of the various steps that the reactionis somewhat faster thanThis necessitates a revision upwards of Steacie and Phillips' estimate of the activation energy of the latter reaction to about 9 Kcal.

ISSN:1923-4287    

DOI:10.1139/cjr38b-039

出版商:NRC Research Press    

年代:1938

数据来源: NRC

摘要:

The mercury photosensitized reactions of ethane-deuterium mixtures have been investigated. The products of the reaction were separated by low-temperature fractional distillation, and the deuterium content of each was determined. It was found that the methane produced was highly deuterized, while the residual ethane was only slightly deuterized. Propane and butane were also considerably deuterized. It is concluded:(a) That rapid exchange of methyl radicals and deuterium atoms occurs, as previously suggested by Morikawa, Benedict, and Taylor;(b) That ethyl radicals are rapidly exchanged in a similar way;(c) That the reactionsanddo not occur to any great extent, and hence the low quantum yield of the reaction cannot be ascribed to re-formation of ethane.

ISSN:1923-4287    

DOI:10.1139/cjr38b-040

出版商:NRC Research Press    

年代:1938

数据来源: NRC

摘要:

The densities and compositions of both phases in then-pentane–methane solubility equilibrium have been determined at 25°, 55°, and 85 °C. at total pressures from 35 to 190 atm. The critical pressures of complete miscibility were found. The properties of the system are discussed. Similar measurements a t 25 °C. and at pressures from 35 to 135 atm. were made on a system composed of a mixture ofn-pentane and isopentane with methane.

ISSN:1923-4287    

DOI:10.1139/cjr38b-041

出版商:NRC Research Press    

年代:1938

数据来源: NRC

摘要:

The densities and compositions of both phases in then-hexane–methane solubility equilibrium have been determined at 25°, 55°, and 85 °C., at total pressures from 35 to 230 atm. The critical pressures of complete miscibility were found. The properties of the system are discussed. Similar measurements were made on a system consisting of a liquid mixture, principally isomeric hexanes, and methane.

ISSN:1923-4287    

DOI:10.1139/cjr38b-042

出版商:NRC Research Press    

年代:1938

数据来源: NRC