KINETICS OF THE THERMAL DECOMPOSITION OF CALCIUM HYDROXIDE

THE KINETICS OF THE THERMAL DECOMPOSITION IN VACUO OF CALCIUM HYDROXIDE WAS INVESTIGATED AT 260, 300, 350, AND 385 C. THE RATE OF THE REACTION INCREASES DURING THE FIRST 10 TO 25% DECOMPOSITION; THEN IT DECREASES. AN ASSUMED MECHANISM LEADS TO AN ENERGY OF ACTIVATION OF 14.3 KCAL./MOLE. THE ENERGY OF ACTIVATION CALCULATED WITHOUT CONSIDERATION OF ANY MECHANISM IS 14.9 PLUS OR MINUS KCAL./MOLE. BECAUSE THE DECOMPOSITION OF CALCIUM HYDROXIDE IS ENDOTHERMIC TO THE EXTENT OF 25.2 KCAL./MOLE, THE ENERGY OF ACTIVATION INDICATES THAT THE REACTION TAKES PLACE IN MORE THAN ONE STEP. /PCA/

• Authors:
  • Mikhail, R S
  • Brunauer, S
  • Copeland, L E
• Publication Date: 0

Media Info

• Serial:
  • Portland Cement Assoc R & D Lab Bull
  • Issue Number: 0

Subject/Index Terms

• TRT Terms: Activation (Chemistry); Calcium compounds; Decomposition; Heat; Hydroxides; Kinetics; Reaction time
• Old TRIS Terms: Activation
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00213639
• Record Type: Publication
• Source Agency: Portland Cement Association
• Report/Paper Numbers: No 205
• Files: TRIS
• Created Date: Jun 1 1970 12:00AM