LOW-TEMPERATURE HEAT CAPACITY AND THERMODYNAMIC PROPERTIES OF SODIUM METHOXIDE

摘要

Heat capacities of sodium methoxide from 5° to 345°K were mea-sured. The heat-capacity curve has the normal sigmoid shape except for a small deflection of undetermined origin near 34CK. This deflection involves an excess entropy of about 0. 43 calorie per mole per degree. The following thermodynamic functions at 298. 16°K were determined (molal values):heat capacity at constant pressure, 16.60 ± 6 calories;and free-energy function, —15. 12 ± 0.03 calories per degree.