Heat capacities and enthalpies of transitions of three nitrobenzonitriles

Add time:08/10/2019    Source:sciencedirect.com

Thermophysical study of the behaviour, as a function of temperature, of the 2-, 3- and 4-isomers of nitrobenzonitriles was carried out by differential scanning calorimetry, in the temperature intervals between 268 K and its respective melting points. The temperatures, enthalpies and entropies of the fusion processes were measured. Several phase transitions were observed for the 2- and 4-isomers and their temperatures, enthalpies and entropies are given.Heat capacities of the 2-, 3- and 4-isomers of nitrobenzonitriles were measured by differential scanning calorimetry between 268 K and their melting temperature and the results obtained were correlated as a function of temperature.

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