THE THERMODYNAMICS OF M-CENTER FORMATION.

Abstract

The equilibrium between F centers and M centers in additively colored KC1 was studied at temperatures between 60C and 130C. The M-center concentration at equilibrium varied approximately as the square of the F-center concentration, verifying the stoichiometric equation: 2F = M. At 60C, the equilibrium constant was 1.7 x 10 to the-19th power cu.cm. Enthalpy change = -4.1 Kcal and entropy change = -98 cal/deg, for the standard state one center cu.cm. The entropy change value agrees with that calculated from the configurational entropy, i.e., R 1n 6/N, where N is the concentration of negative ion sites. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jul 10, 1966
Accession Number
AD0636316

Entities

People

  • Allen B. Scott
  • E. H. Coker
  • John D. Zahrt

Organizations

  • Oregon State University

Tags

DTIC Thesaurus Topics

  • Color Centers
  • Enthalpy
  • Enthalpy Changes
  • Entropy
  • Equations
  • Equations Of State
  • Mathematics
  • Physical Properties
  • Standards
  • Thermodynamic Properties
  • Thermodynamics

Readers

  • Combustion science or combustion engineering.
  • Materials Science and Engineering.