Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)
National Exams — December 2014 — 04-Chem-A1 Process Balances and Chemical Thermodynamics. Three-hour, open-book exam; any non-communicating calculator permitted. Format: seven questions in three parts — answer one of Q1–Q2 (Part A, 15 marks), one of Q3–Q4 (Part B, 25 marks) and two of Q5–Q7 (Part C, 30 marks each); four questions total 100 marks. All seven are solved below for completeness. Property data are stated explicitly in each Given block; units follow the paper (mixed SI and US/older conventions).
Reference texts: Felder, Rousseau & Bullard, Elementary Principles of Chemical Processes (4th ed., Wiley) — material & energy balances, single-phase systems, combustion and recycle; Smith, Van Ness, Abbott & Swihart, Introduction to Chemical Engineering Thermodynamics (8th ed., McGraw-Hill) — VLE and excess-property (Margules) models, compressor work, and reaction equilibrium; supporting property data from Perry's Chemical Engineers' Handbook (9th ed.) and the NIST Chemistry WebBook (Antoine constants, C₀p polynomials, standard enthalpies and Gibbs energies of formation).
