scholarly journals The isotherms of hydrogen, carbon monoxide and their mixtures

In investigations involving gases at high pressures it is as essential to know the relative densities of the media concerned as it is their actual pressures. This demands a knowledge of the deviations from the ideal gas laws over wide ranges of pressure and temperature for each particular medium. Although reliable data are available for the commoner single gases, with perhaps the exception of carbon monoxide, as yet little is known concerning the compressibility of mixtures, except generally that neither the Law of Partial Pressures nor the Law of Additive Volumes is strictly obeyed. In this connection the recent researches of Masson, Verschoyle, Bartlett, Keyes and their co-workers have been very informative, yet a great deal more work needs to be done before such lacunæ in our knowledge of such matters are filled.

2021 ◽  
pp. 129-151
Author(s):  
Christopher O. Oriakhi

Gas Laws summarizes the general laws that describe how the volume of a gas changes in response to changes in pressure (P), temperature (T in Kelvin) or the number of moles (n). The ideal gas law, which combines Boyle’s law, Charles’s law and Avogadro’s law, is presented, with explanations of using it to solve gas-law problems. Mathematical rearrangements of the ideal gas law to determine density and molar mass are described along with the use of Dalton’s law of partial pressures to find the pressure of each gas in a mixture. Finally the chapter presents ideal gas law and reaction stoichiometry, Graham’s law of effusion, and basic notions of real gases and their deviation from the ideal gas laws.


2020 ◽  
Vol 02 (01) ◽  
pp. 2020001
Author(s):  
Dulli C. Agrawal

The illustrious question by German Astrophysicist R. Emden, “Why do we have winter heating?” has been re-examined for air following both the ideal and imperfect gas laws; the internal energy of the air in the room remains unaffected in the former case whereas it increases marginally for the latter one. The findings corresponding to ideal gas law were correlated by Emden with the mass of a person which does not change even though food is constantly consumed. This example corresponds to adulthood when the mass of a person remains more or less constant. But the marginal change of internal energy in the case of van der Waals gas is consistent with three stages of a person — initially a person grows during childhood followed by adulthood when he has more or less constant weight and finally in old age, it deteriorates.


Keyword(s):  
Gas Laws ◽  

This chapter details Dmitrii Mendeleev's turn to gas laws. In 1871, Mendeleev's successes lay far in the future. However, his bold predictions of 1871 had two glaring deficiencies: they were unsubstantiated, and they were not in the chemical tradition. The whole thing smacked of physics, and, as the chemist abandoned his half-hearted attempts to uncover his missing elements, his wavering attention shifted to that science. In the eyes of his peers, Mendeleev had abandoned his chemical guesses—and chemistry altogether—in favor of subsidized research on gas laws, of all things. This new, broadly conceived gas project would dominate his attention throughout the 1870s, but, in contrast to the repeated successes of the periodic law, every aspect of the effort would end in dramatic failure.


Thermofluids ◽  
1996 ◽  
pp. 106-122
Author(s):  
Keith Sherwin ◽  
Michael Horsley
Keyword(s):  
Gas Laws ◽  

1960 ◽  
Vol 13 (2) ◽  
pp. 194 ◽  
Author(s):  
JD Blackwood ◽  
AJ Ingeme

A study has been made of the reactions of purified carbon with carbon dioxide at pressures up to 40 atm and in the temperature range 790-870 �C. The effect of carbon monoxide has been examined by adding varying proportions of this gas to the carbon dioxide supplied to the reactor bed. At high carbon dioxide and carbon monoxide partial pressures, the rate of formation of carbon monoxide is greater than would be expected from the mechanism proposed by Gadsby et al. (1948). A mechanism has been proposed whereby the increased rate may be explained by additional steps involving the interaction of a carbon dioxide molecule with an adsorbed carbon monoxide to produce adsorbed oxygen, thus : ������������������ CO2 + (CO) → 2CO +(O) A general rate equation has been derived which includes this step and satisfies the experimental results. The reverse mechanism by which carbon monoxide can disappear is not the simple reverse of the forward process and at high pressures equilibrium cannot be expressed by the usual expression derived for the simple single-stage reversible process. The possible nature of active sites has been examined by studying the reactivity of a series of chars prepared at different temperatures. The reactivity appears to be related to the oxygen content of the chars and the type of active centres involved may be different from those which control the carbon-steam mechanism.


Thermofluids ◽  
1996 ◽  
pp. 21-23
Author(s):  
Keith Sherwin ◽  
Michael Horsley
Keyword(s):  
Gas Laws ◽  

2011 ◽  
Vol 12 (2) ◽  
pp. 757-784 ◽  
Author(s):  
András Jakab

In the following Article I will develop seven ideal-typical role models for (or caricatures of) legal scholars: the Oracle Scientist, the Prophet, the Law Reformer, the Humble Clerk, the Wise Pragmatist, the Self-Reflective, and the Media Star. Ten features will be used to characterize the ideal for each model: primary audience, ideal function, perverted form, influence on the law, prestige, measure of success, time scale, use of non-legal (moral or social/economic) arguments, precondition of existence, typical countries, and famous lawyers (representing themselves or at least proposing to other legal scholars to follow that specific role model).


1948 ◽  
Vol 48 (2) ◽  
pp. 118-121
Author(s):  
George Antonoff ◽  
Duncan Randall
Keyword(s):  
Gas Laws ◽  

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