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Keywords:

  • Urea—degradation in concentrated aqueous solution, temperature control;
  • Conductivity—urea degradation monitoring;
  • Rate constants—aqueous urea degradation;
  • Specific conductivity—urea degradation monitoring

Abstract

The degradation of urea in 2.00, 4.00, 6.00, and 8.00 M aqueous solutions was studied at 25.0, 35.0, and 45.0°. Data were obtained by measuring the specific conductivity of the solutions at 6-hr. intervals over 3.5 days. The results show that the degree of degradation is extremely small and that the overall process conforms to a first- and second-order reversible reaction. Rate constants were determined for the forward and reverse reactions and compare favorably to values reported by other workers for the separate reactions.