The Coefficients of Viscosity and Slip of Carbon Dioxide by the Oil Drop Method and the Law of Motion of an Oil Drop in Carbon Dioxide, Oxygen, and Helium, at Low Pressures

1923 ◽  
Vol 22 (2) ◽  
pp. 161-170 ◽  
Author(s):  
James M. Eglin
Keyword(s):  
Carbon Dioxide ◽  
Drop Method ◽  
The Law ◽  
Low Pressures

scholarly journals On the absorption of water by cotton and wool

1907 ◽  
Vol 79 (529) ◽  
pp. 204-205 ◽  
Keyword(s):  
Carbon Dioxide ◽  
Water Vapour ◽  
Air Temperature ◽  
Amorphous Carbon ◽  
The Law ◽  
Relationship Of ◽  
Low Pressures ◽  
The Relationship ◽  
System Water ◽  
Mechanical Rigidity

In a footnote to my paper entitled “ The Law of Distribution where one of the Phases possesses Mechanical Rigidity," I attempted to show how the results obtained by Professor Trouton for the absorption of water vapour by cotton could be reconciled with those obtained by me in the case of similar systems, such as carbon dioxide and amorphous carbon. As the apparatus I had employed in the investigation referred to was particularly suited to the accurate measurement of low pressures, I obtained Professor Trouton’s permission to repeat his work, and to investigate the relationship of pressure and concentration for the systems water-cotton and water-wool at the temperature of melting ice. I was particularly anxious to redetermine the lower portions of the curves, for as in Professor Trouton’s experiments the material was dried at the air temperature, it appeared probable that it contained water at the commencement of the experiment, and that the true origin of his curves lay further to the left than the results appeared to show. If this were the case, the true curve representing equilibrium in the system water-cotton might closely resemble those representing equilibrium in the system carbon dioxide and amorphous carbon.

scholarly journals On the laws governing electric discharges in gases at low pressures

1903 ◽  
Vol 71 (467-476) ◽  
pp. 374-376 ◽  
Keyword(s):  
Carbon Dioxide ◽  
Electric Field ◽  
Potential Difference ◽  
Electric Discharges ◽  
Wide Range ◽  
Apparatus 3 ◽  
The Law ◽  
Low Pressures ◽  
Different Gases

The experiments described in this paper were undertaken with the object of determining the potential difference required to produce discharge in a number of gases over a wide range of pressures, and especially of ascertaining if the law enunciated by Paschen was generally applicable, provided the electric field in which the discharge took place was uniform. The paper is divided into the following sections :— (1.) Introduction. (2.) Description of apparatus. (3.) Experiments in air. (4.) Experiments in hydrogen. (5.) Experiments in carbon dioxide. (6.) Spark potentials with different electrodes. (7.) Minimum spark potentials. (8.) Connection between spark lengths and spark potentials. (9.) Minimum spark potentials in different gases. (10.) Summary of results.

scholarly journals Carbon Dioxide Conversion to Methanol over Size-Selected Cu4 Clusters at Low Pressures

2015 ◽  
Vol 137 (27) ◽  
pp. 8676-8679 ◽  
Author(s):  
Cong Liu ◽  
Bing Yang ◽  
Eric Tyo ◽  
Soenke Seifert ◽  
Janae DeBartolo ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Conversion ◽  
Low Pressures

scholarly journals Bakerian lecture.—On the law of the pressure of gases between 75 and 150 millimetres of mercury

1902 ◽  
Vol 69 (451-458) ◽  
pp. 495-495
Keyword(s):  
Mercury Column ◽  
In Series ◽  
The Law ◽  
Low Pressures

The observations here recorded were intended to bridge over in some degree the gap between the very low pressures (below 1·5 mm.) dealt with in a recent paper and pressures approaching the atmospheric for which the usual mercury column and cathetometer method is adequate. The principal novelty consists in the use of two similar manometric gauges. Pressures in the ratio of 1 : 2 are obtained by the use first of a single gauge and secondly of the two gauges connected in series.

scholarly journals A study of catalytic actions at solid surfaces. —IV. The interaction of carbon monoxide and steam as conditioned by iron oxide and by copper

1920 ◽  
Vol 97 (684) ◽  
pp. 265-273 ◽  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Iron Oxide ◽  
Equilibrium Constant ◽  
Homogeneous System ◽  
Solid Surfaces ◽  
Mass Action ◽  
Law Of Mass Action ◽  
The Law

The process summed up in the equation CO + H 2 O ⇆ CO 2 + H 2 + 10,200 cal. is limited by the conditions which govern any homogeneous system in equilibrium: if the concentration of carbon monoxide, water, carbon dioxide, and hydrogen be denoted by a , b , c , d respectively, by the usual application of the law of mass action k 1 ab = k 2 cd , or K = k 2 / k 1 = ab / cd . The value of K, the “equilibrium constant,” depends on the temperature at which interaction takes place.

scholarly journals IX. Bakerian Lecture .—On the law of the pressure of gases between 75 and 150 millimetres of mercury

1902 ◽  
Vol 198 (300-311) ◽  
pp. 417-430 ◽  
Keyword(s):  
Pressure Chamber ◽  
Present Communication ◽  
In Series ◽  
Experimental Errors ◽  
The Law ◽  
Open Question ◽  
High Degree ◽  
Low Pressures ◽  
Published Paper ◽  
Boyle’S Law

In a recently published paper I have examined, with the aid of a new manometer, the behaviour of gases at very low pressures, rising to 1·5 millims. of mercury, with the result that Boyle’s law was verified to a high degree of precision. There is, however, a great gap between the highest pressure there dealt with and that of the atmosphere—a gap which it appeared desirable in some way to bridge over. The sloping manometer, described in the paper referred to, does not lend itself well to the use of much greater pressures, at least if we desire to secure the higher proportional accuracy that should accompany the rise of pressure. The present communication gives the results of observations, by another method, of the law of pressure in gases between 75 millims. and 150 millims. of mercury. It will be seen that for air and hydrogen Boyle’s law is verified to the utmost. In the case of oxygen, the agreement is rather less satisfactory, and the accordance of separate observations is less close. But even here the departure from Boyle’s law amounts only to one part in 4000, and may perhaps be referred to some reaction between the gas and the mercury. In the case of argon too the deviation, though very small, seems to lie beyond the limits of experimental errors. Whether it is due to a real minute departure from Boyle’s law, or to some complication arising out of the conditions of experiment, must remain an open question. In the case of pressures not greatly below atmosphere, the determination with the usual column of mercury read by a cathetometer (after Regnault) is sufficiently accurate. But when the pressure falls to say one-tenth of an atmosphere, the difficulties of this method begin to increase. The guiding idea in the present investigation has been the avoidance of such difficulties by the use of manometric gauges combined in a special manner. The object is to test whether when the volume of a gas is halved its pressure is doubled, and its attainment requires two gauges indicating pressures which are in the ratio of 2:1. To this end we may employ a pair of independent gauges as nearly as possible similar to one another, the similarity being tested by combination in parallel, to borrow an electrical term. When connected below with one reservoir of air and above with another reservoir, or with a vacuum, the two gauges should reach their settings simultaneously, or at least so nearly that a suitable correction may be readily applied. For brevity we may for the present assume precise similarity. If now the two gauges be combined in series , so that the low-pressure chamber of the first communicates with the high-pressure chamber of the second, the combination constitutes a gauge suitable for measuring a doubled pressure.

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