�ber die Isothermen einiger Gase zwischen +400� und ?183�

Holborn, L.; Otto, J.

doi:10.1007/bf01328287

Cited by 161 publications

(23 citation statements)

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“…The Reichsanstalt measurements on argon are quoted in table 3 given by Holborn and Otto [4] based on the same data, yields 10 5 " , = -98.1 at 1 atmosphere. The difference, about 4 percent, is about the same as that previously found for oxygen, and for the same reason .…”

Section: Argonmentioning

confidence: 88%

Slopes of pv isotherms of He, Ne, A, H2, N2, and O2 at 0 degrees C

Cragoe¹

1941

J. RES. NATL. BUR. STAN.

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The change of po (pressure times volume of a constant mass of gas) with pressure or density at constant temperature and low pressures is treated as a characteristic physical quantit.y. Various methods of determining this quantity from available experimental data for several gases, including He, Ne, A, H~, N2, and O2, are examined with special reference to the reliability of the values at 0° C.Reliable values for these quantities are important for many purposes, such as correcting temperatures measured by means of gas thermometers to the thermodynamic scale and in the derivation of the absolute t emperature of the ice point,

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Section: Argonmentioning

confidence: 88%

Slopes of pv isotherms of He, Ne, A, H2, N2, and O2 at 0 degrees C

Cragoe¹

1941

J. RES. NATL. BUR. STAN.

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“…It was necessary to allow for this departure in relating the number density N to the pressure p. the values of p used were calibration points of the pressure gauge. The value of the second virial coefficient B(T), measured by Holborn and Otto (1925) and quoted by Hirschfelder et al (1954), was used to calculate N for each value of p at the prevailing temperature. The voltage required to produce the required value of E/ N was then applied.…”

Section: (B) Temperature Determinationmentioning

confidence: 99%

Drift Velocities of Low Energy Electrons in Argon at 293 and 90 K

Robertson¹

1977

Aust. J. Phys.

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The drift velocity of electrons in argon has been measured at 90 K in the range 0·002 ,;;; E/ N (Td) :.;; 0·7 and at 293 K in the range 0·01 ,;;; E/N (Td) ,;;; 1·0. The high sensitivity of the drift velocities to the presence of small quantities of diatomic impurities, particularly nitrogen, was demonstrated by adding known but trace quantities of diatomic gases. In this way it was observed that the presence of 6 p.p.m. nitrogen in the argon gave errors in the drift velocity of up to 3 %. As a result it was necessary to purify research grade gas before use. A full discussion is given of the errors incurred in the measurements.

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“…Their result for the helium case is excellent according to experimental variations of the second virial coefficient B(T) measured by Holborn and Otto [5] and also given in [1]. However, for the hydrogen case they calculated T i twice to big than its estimated experimental value [1,5]. Boschi-Filho and Buthers [3] studied the Joule inversion temperature for several simple real gases at high temperatures based on the B(T) behavior and they suggested that most of simple real gases have an inversion temperature corresponding to the maximum value of B(T) in a range of temperatures so high that few experimental data are available.…”

Section: Introductionmentioning

confidence: 67%

“…According to Callen [1], the experimental Joule inversion temperature for hydrogen is T i 400 K. By means of a LJpotential, Goussard and Roulet [2] calculated T i 800 K. However, if one uses the algebraic expression for B(T) given by Holborn and Otto [3,5] the resulting T i is 474 K, no so far the accepted experimental value T i 400 K. In section 3, we found that by means of a LJ-potential modified by using a Jagla type ramp the Joule inversion temperature for H 2 is T i 922 K. However, if we use a Lennard-Jones potential with exponents (12,6), B(T) can be calculated as an infinite power series [3,12]. This expression, by means of dB/dT = 0 gives us the reduced inversion temperatures shown in Table 1.…”

Section: (24 12) Lennard-jones Potentialmentioning

confidence: 99%

“…For example, for the Lennard-Jones model u(r) ~ r 12 for r 0, and they used this potential to calculate T i for helium and hydrogen [2]. Their result for the helium case is excellent according to experimental variations of the second virial coefficient B(T) measured by Holborn and Otto [5] and also given in [1]. However, for the hydrogen case they calculated T i twice to big than its estimated experimental value [1,5].…”

Section: Introductionmentioning

confidence: 99%

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Joule Inversion Temperatures for Some Simple Real Gases

Albarrán-Zavala¹,

Espinoza-Elizarrarazubo²,

Angulo‐Brown³

2009

TOTHERJ

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Abstract:In the present work we calculate inversion temperatures T i , for some simple real gases (He, Ne, Ar, Kr and H 2 ) in the case of a Joule expansion; that is, a free adiabatic expansion. These calculations are made by means of an intermolecular potential of the Lennard-Jones type (12, 6), slightly modified by using a Jagla linear ramp in the repulsive part of the potential. For the Helium we find a T i in agreement with both previous calculations published by other authors and with experimental results. For Ne and Ar our results are also within the interval of values previously reported, and for Kr we also obtain a very high inversion temperature as some other authors. However, for H 2 we find a T i approximately twice to big than its estimated experimental value. This last calculation is corrected if we use a short ranged Lennard-Jones potential of the type (24, 12), obtaining a result in good agreement with the recognized experimental value.

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�ber die Isothermen einiger Gase zwischen +400� und ?183�

Cited by 161 publications

References 0 publications

Slopes of pv isotherms of He, Ne, A, H2, N2, and O2 at 0 degrees C

Slopes of pv isotherms of He, Ne, A, H2, N2, and O2 at 0 degrees C

Drift Velocities of Low Energy Electrons in Argon at 293 and 90 K

Joule Inversion Temperatures for Some Simple Real Gases

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