Boron nitride (BN) has a structure similar to graphite, but is a white insulator rather than a black conductor. It is synthesized by heating diboron trioxide with ammonia at about 1000°C. (a) Write a balanced equation for the formation of BN; water forms also.(b) Calculate ΔH°rxn for the production of BN (ΔH°f of BN is -254 kJ/mol).(c) Boron is obtained from the mineral borax, Na₂B₄O₇.10H₂O.How much borax is needed to produce 1.0 kg of BN, assuming 72% yield?
Boron nitride (BN) has a structure similar to graphite, but is a white insulator rather than a black conductor. It is synthesized by heating diboron trioxide with ammonia at about 1000°C. (a) Write a balanced equation for the formation of BN; water forms also.(b) Calculate ΔH°rxn for the production of BN (ΔH°f of BN is -254 kJ/mol).(c) Boron is obtained from the mineral borax, Na₂B₄O₇.10H₂O.How much borax is needed to produce 1.0 kg of BN, assuming 72% yield?
Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter8: Thermochemistry
Section: Chapter Questions
Problem 34QAP: A reaction used to produce the silicon for semiconductors from sand (SiO2), can be broken up into...
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Boron nitride (BN) has a structure similar to graphite, but is a white insulator rather than a black conductor. It is synthesized by heating diboron trioxide with ammonia at about 1000°C. (a) Write a balanced equation for the formation of BN; water forms also.(b) Calculate ΔH°rxn for the production of BN (ΔH°f of BN is -254 kJ/mol).(c) Boron is obtained from the mineral borax, Na₂B₄O₇.10H₂O.How much borax is needed to produce 1.0 kg of BN, assuming 72% yield?
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