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...

thermodynamics

Extracted 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 bx 103 cx 10-5 a (J/mole.K) C (s) 6. 17 ... B (s) 16 ... BẠC (s) - 63000 27 96