Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)
Paper format: National Exams, May 2014 — 04-Chem-A1 Process Balances and Chemical Thermodynamics, three-hour, open book, any non-communicating calculator. The paper is in four parts: Part A (Q1–Q2, 20%), Part B (Q3–Q4, 30%), Part C (Q5–Q6, 20%) and Part D (Q7–Q8, 30%); a candidate answers ONE question from each part. For completeness all eight questions are fully worked below.
Reference texts: Smith, Van Ness & Abbott, Introduction to Chemical Engineering Thermodynamics (8th ed.) for the energy balances, residual properties, VLE and reaction equilibrium; Felder & Rousseau, Elementary Principles of Chemical Processes (4th ed.) for the material and energy balances; steam properties from the ASME/NIST steam tables (Cengel & Boles appendix). SI throughout; ideal-gas constant \(R = 8.314\ \mathrm{J\,mol^{-1}K^{-1}}\).
