Silicon nitride, Si 3 N 4 , has physical, chemical, and mechanical properties that make it a

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Silicon nitride, Si3N4, has physical, chemical, and mechanical properties that make it a useful industrial material. For a particular engineering project, it is crucial that you know the heat of formation of this substance. A clever experiment allows direct determination of the ΔH° of the following reaction:

3 CO(g) + Si3N4(s)  3 SiO(s) + 2 N(g) + 3 C(s)


Based on the fact that you know the enthalpy change in this reaction, state what additional data might be looked up or measured to determine ΔHf° for silicon nitride.

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Chemistry For Engineering Students

ISBN: 9780357026991

4th Edition

Authors: Lawrence S. Brown, Tom Holme

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