Melamine is an important industrial chemical, used to make fertilizers and plastics. (a) The carbon-nitrogen bond lengths

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Melamine is an important industrial chemical, used to make fertilizers and plastics.HN :N C. NH C. N Melamine N: C. NH

(a) The carbon-nitrogen bond lengths in the ring are all the same length (about 140 pm). Explain.
(b) Melamine is made by the decomposition of urea, (H2N)2CO.6 (HN)CO(s)  C3H6N6(s) + 6 NH3(g) + 3 CO(g)

Calculate the enthalpy change for this reaction. Is it endo- or exothermic? [Δf H° for melamine(s) =
−66.1 kJ/mol and for urea(s) = −333.1 kJ/mol]

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Chemistry And Chemical Reactivity

ISBN: 9780357001172

10th Edition

Authors: John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

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