MEASUREMENT OF THE UNIVERSAL GAS-CONSTANT R USING A SPHERICAL ACOUSTIC RESONATOR

被引：215

作者：

MOLDOVER, MR

TRUSLER, JPM

EDWARDS, TJ

MEHL, JB

DAVIS, RS

机构：

[1] UNIV DELAWARE, PHYS, NEWARK, DE 19716 USA

[2] NBS, CTR BASIC STAND, DIV LENGTH & MASS, GAITHERSBURG, MD 20899 USA

来源：

JOURNAL OF RESEARCH OF THE NATIONAL BUREAU OF STANDARDS | 1988年 / 93卷 / 02期

关键词：

ACOUSTIC RESONATORS - Applications - ACOUSTIC WAVES - Velocity - ARGON - Acoustic Properties - GASES - Measurements;

D O I：

10.6028/jres.093.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report a new determination of the Universal Gas Constant R: (8. 314 471 plus or minus 0. 000 014) J multiplied by (times) mol** minus **1K** minus **1. The uncertainty in the new value is 1. 7 ppm (standard error), a factor of 5 smaller than the uncertainty in the best previous value. The gas constant was determined from measurements of the speed of sound in argon as a function of pressure at the temperature of the triple point of water. The speed of sound was measured with a spherical resonator whose volume was determined by weighing the mercury required to fill it at the temperature of the triple point. The molar mass of the argon was determined by comparing the speed of sound in it to the speed of sound in a standard sample of argon of accurately known chemical and isotopic composition.

引用

页码：85 / 144

页数：60

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