Although nitrogen trifluoride (NF 3 ) is a thermally stable compound, nitrogen triiodide (NI 3 ) is

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Although nitrogen trifluoride (NF3) is a thermally stable compound, nitrogen triiodide (NI3) is known to be a highly explosive material. NI3 can be synthesized according to the equation

BN(s) + 3IF(g)  BF3(g) + NI3(s)

a. What is the enthalpy of formation for NI3(s) given the enthalpy of reaction (-307 kJ) and the enthalpies of formation for BN(s) (-254 kJ/mol), IF(g) (-96 kJ/mol), and BF3(g) (-1136 kJ/mol)?

b. It is reported that when the synthesis of NI3 is conducted using 4 moles of IF for every 1 mole of BN, one of the by-products isolated is [IF2]+[BF4]-. What are the molecular geometries of the species in this by-product? What are the hybridizations of the central atoms in each species in the by-product?  

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Chemistry An Atoms First Approach

ISBN: 9781305079243

2nd Edition

Authors: Steven S. Zumdahl, Susan A. Zumdahl

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