Application of solution calorimetry for kinetic studies of hydrazine sulphate and hydroxylamine hydrochloride

Abstract

The enthalpy of reaction of hydrazine sulphate and hydroxylamine hydrochloride in various acid media has been studied by direct injection enthalpimetric titration. The calorimetric method is used to study reaction kinetics in solution using ceric ammonium nitrate in nitric and perchloric acids. The enthalpy of reaction content of hydrazine sulphate in nitric acid is found to be -8.47 kcal/mol, and for hydrazine sulphate in perchloric acid it is -6.5 kcal/ mol. For hydroxylamine hydrochloride enthalpy of reaction is found to be -5.12 kcal/mol in perchloric acid media. The results have also been analysed using a simple fortran program and optimizationscarried out using a multidimensional direct method.Modification as suggestedby Powell have been incorporatedin fortranprogram.The rate constants are 0.028 S^-1 and 0.037 S^-1 in HNO₃ and HCIO₄.