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2. A stoichiometric mixture of elemental boron and graphite is processed to form a compact which is ignited in an SHS (Self-propagating High-temperature Synthesis) reaction to produce boron carbide (B4C). The reaction is: 4 B (s) + C (s) = BẠC (s)

2. A stoichiometric mixture of elemental boron and graphite is processed to form a compact which is ignited in an SHS (Self-propagating High-temperature Synthesis) reaction to produce boron carbide (B4C). The reaction is: 4 B (s) + C (s) = BẠC (s)

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
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2. A stoichiometric mixture of elemental boron and graphite is processed to form a compact which is ignited in an SHS (Self-propagating High-temperature Synthesis) reaction to produce boron carbide (B4C). The reaction is: 4 B (s) + C (s) = B.C (s) a) If the compact (the mixture of B and C) is initially at 298 K, what is the temperature boron carbide could attain when the reaction is adiabatic? b) Calculate entropy change of the process. Cp = a + bT+cT² (J/mol.K) AH°298 (J/mole) S° 298 a bx 103 сх 105 (J/mole.K) C (s) 17 ... B (s) 16 ... B.C (s) - 63000 27 96
Transcribed Image Text:2. A stoichiometric mixture of elemental boron and graphite is processed to form a compact which is ignited in an SHS (Self-propagating High-temperature Synthesis) reaction to produce boron carbide (B4C). The reaction is: 4 B (s) + C (s) = B.C (s) a) If the compact (the mixture of B and C) is initially at 298 K, what is the temperature boron carbide could attain when the reaction is adiabatic? b) Calculate entropy change of the process. Cp = a + bT+cT² (J/mol.K) AH°298 (J/mole) S° 298 a bx 103 сх 105 (J/mole.K) C (s) 17 ... B (s) 16 ... B.C (s) - 63000 27 96
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