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The thermodynamics of perchlorates. I. Heat capacity of ND4ClO4 from 7 to 345 K and the analysis of heat capacities and related data of NH4ClO4 and ND4ClO4
Journal of Chemical Physics
The heat capacity of the orthorhombic salt: deuterated ammonium perchlorate, ND4 CI0 4 , was measured from 7 to 345 K using adiabatic calorimetry. The heat capacity against temperature curve is smooth, continuous and without anomaly. Values of the standard molar thermodynamic quantities are presented up to 340 K. The heat capacities ofND4 CI0 4 and NH4 CI0 4 have been analyzed. The contributions to the vibrational heat capacity from the external optical modes ofNH/ or ND 4 +, CI0 4and librationdoi:10.1063/1.457474 fatcat:ob3osn746vadpbkvittumxpcfa