Succinic acid. Heat capacities and thermodynamic properties from 5 to 328 K. An efficient drying procedure

Abstract

Heat capacities of succinic acid from 5 to 328 K were determined by adiabatic calorimetry. At 298.15 K, values of Cp, So, (Ho-H0o)/T and (Go-H0o)/T are 36.55, 39.99, 20.23, and -19.76 cal K-1 mol-1. No thermal anomalies were detected except that from a trace of occluded water at 272 K, found to be (0.0030 +/- 0.0005) per cent by analysis of the excess enthalpy absorption. Equilibration of pressed pellets for two days in a desiccator over Drierite proved to be an effective final drying technique.