1938 Volume 13 Issue 1 Pages 41-48
As the specific heat of silicon nitride has not yet been determined, the mean specific heat of silicon nitride was measured by the ice calorimeter over three temperature intervals: 0–99.5, 0–316.4, and 0–585°C., and the equation of the true specific heat was obtained which holds good over the above temperature ranges:
By using this value, the heat of formation of silicon nitride was computed from the dissociation pressure of silicon nitride at high temperatures. The result obtained is as follows:
The relationship between the heats of formation of nitrides of the elements belonging to the second series of the periodic table and their atomic numbers is discussed.
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