New Batch Cells Adapted To Measure Saturated Heat Capacities of Liquids

Abstract

New “batch” cells adapted to measure saturated heat capacities with a Micro DSC II (Setaram) microcalorimeter designed to avoid any leakage during measurement are described. Using the “scanning” and “step-by-step” methods, the heat capacities of pure organic liquidshexane, heptane, decane, dodecane, cyclohexane, toluene, methanol, and 1-butanolin the temperature range (5 to 75) °C were determined. In addition, the excess heat capacities of several binary liquid mixtures(benzene + cyclohexane) and (2,5,8,11-tetraoxadodecane + dodecane)with the step-by-step procedure were measured. A very close agreement with literature values better than 1% indicates that the apparatus and technique are suitable for heat capacity measurements on volatile liquids.