Heat capacities of liquids linear aliphatic polyoxides

Heat capacities at constant pressure of liquid polyoxymethylene (430-540 K) and polyoxyethylene (330-430 K) have been measured by scanning calorimetry. These new data are discussed together with the heat capacity of polyethylene and other linear, aliphatic polyoxides to arrive at a wide-range addition scheme for heat capacities. Values of absolute entropy, enthalpy, and Gibbs free energy are estimated. The new data are offered as “Recommended Data 1984” in our ATHAS Data Bank.