MOLECULAR VELOCITY DETERMINATION THROUGH GAS EFFUSION: INTERMEDIATE LABORATORY EXPERIMENT (In American Journal of Physics -- January 1969 -- Volume 37, Issue 1, Pp. 39)

By: Benenson, R. E.

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Thin 4to 11" - 13" tall; 7 pages; We are offering the entire issue which contains this article. An experiment is described to determine the average velocity of gas molecules in a container while effusion takes place through a small hole into vacuum. When the mean free path of the molecules becomes large compared to the hole diameter, the measurement of pressure as a function of time permits the average velocity to be extracted. The equipment and procedure are simple, and an agreement to within 10% of the kinetic theory of gas value has been obtained using an inexpensive McLeod gauge. The experiment has been performed using air, helium, and argon; measurements on air and helium were performed both at room and dry ice temperatures. A formula has been derived to take into account the effect of outgassing of the container walls at low pressures. Average velocities may be extracted either by a hand calculation between pairs of data points, or by using a short computer program for least-squares analysis. A derivat

Title: MOLECULAR VELOCITY DETERMINATION THROUGH GAS EFFUSION: INTERMEDIATE LABORATORY EXPERIMENT (In American Journal of Physics -- January 1969 -- Volume 37, Issue 1, Pp. 39)

Author Name: Benenson, R. E.

Categories: Physics Education,

Edition: First Edition Thus

Publisher: New York, American Institute of Physics. American Journal of Physics: 1969

Binding: Wrappers

Book Condition: Very Good

Seller ID: 7087

Keywords: Physics History Physics Experimentation Gases