Abstract
Summary In continuation of previous investigations made by one of us together with Prof. Keesom on the velocity of sound in gases at low temperatures we have studied oxygen gas at liquid oxygen temperatures by using ultrasonics. The apparatus used is described. We determined the velocity of sound as a function of pressure at seven temperatures obtained with liquid oxygen. The velocity of sound as a function of pressure can be represented by means of a formula of the following form: W = W 0 ( 1 + s p ) Where W0 = (cp/cv)p = 0 (RT/M), (cp/cv)p = 0 being the ratio of the specific heats for an ideal gas; R the gas constant, T the absolute temperature, and M the molecular mass. Further s = S / R T , with S = B + T λ d B d T + T 2 2 λ ( λ + 1 ) d 2 B d T 2 in which B represents the second virial coefficient, λ = cv/R. From these measurements we established a formula for B as a function of T and which is valid between 200°K. and 75°K. We computed also cp/cv, cv and cp as a function of pressure at five temperatures within the liquid oxygen temperature region.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
