Accession Number:

AD0611364

Title:

HEAT CAPACITY LAG IN HEAVY GASES.

Descriptive Note:

Final rept.,

Corporate Author:

IOWA STATE UNIV OF SCIENCE AND TECHNOLOGY AMES

Personal Author(s):

Report Date:

1961-07-01

Pagination or Media Count:

3.0

Abstract:

Purpose To examine and interpret the dispersion of sound in heavy vapors. Summary The general objective under this and several preceding contracts has been the study and interpretation of sound dispersion in heavy gases. In particular, the objective under the present contract is to determine the effect of electric field on the vibrational relaxation times of some heavy polar gases. One might expect that an electric field would partially align polar molecules so that their orientation upon collision would not be completely random as before. Hence, a small change in the relaxation time might be expected. The polar gases, CH2F2, CHF3 and C2H4 which have a high, medium and zero dipole moment respectively were used in the study. They also have dispersion regions which are easily accessible. Argon, which has no dipole moment and no dispersion, was examined to insure that the electric field produced no other effect on the velocity than that due to molecular alignment. The gases were examined in various field strengths with the maximum field being 9000 volts per centimeter. No measurable effect on the velocity was found for any of the gases examined. Hence, one can conclude that an electric field of this strength has no appreciable effect on the relaxation times of heavy polar gases. Document quoted in its entirety.

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE