Entropy, Heat Capacity, and Heats of Transition of 1,2,4hyphen;Trimethylbenzene

摘要

The heat capacity and the heats and temperatures of fusion of 1,2,4hyphen;trimethylbenzene have been determined experimentally. This substance exhibits two melting points: at 229.33plusmn;0.03deg;K and at about 224.2deg;K. The only solid phase having reproducible heat capacities was found to be the one having the highest melting point. The entropy of the ideal gas at 25deg;C and one atmos pressure has been found to be 99.59plusmn;0.15 cal/deg mole.