Accession Number : ADA315827

Title :   Application of the High Temperature Calorimeter to the Determination of the Heats of Formation of Na-Sn and Li-Sn Alloys,

Corporate Author : TECHNICAL INFORMATION SERVICE (AEC) OAK RIDGE TN

Personal Author(s) : Barber, George R. ; Brewer, Leo ; Bromley, LeRoy A. ; McKisson, Raleigh L.

PDF Url : ADA315827

Report Date : JUL 1948

Pagination or Media Count : 41

Abstract : A method has been devised for using the high frequency induction coil as a high temperature calorimeter. The method enables one to determine the heat effects produced at high temperatures. The method has been applied to the determination of the heats of formation of the alloys Na-Sn and Li-Sn. The average heat of formation (delta H) determined for Na-Sn is -9.63 +/= 0.40 hilocalories per mole at 8730 K. This value becomes -10.6 +/= 0.6 kilocalories per mole when extrapolated to 298 deg K. The average heat of formation (delta H) determined for Li-Sn is -17.57 +/= 0.83 kilocalories per mole at 850 deg K. This value becomes -18.62 +/= 1.50 kilocalories per mole when extrapolated to 298 deg K. These results are compared with the results of other investigators.

Descriptors :   *CALORIMETERS, *HEAT OF FORMATION, COILS, HIGH FREQUENCY, HIGH TEMPERATURE, HEAT, DETERMINATION, INDUCTION SYSTEMS.

Subject Categories : Test Facilities, Equipment and Methods
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE