Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)
National Exams — December 2015 — 04-Chem-A1 Process Balances and Chemical Thermodynamics. Three-hour, open-book exam; any non-communicating calculator permitted. Format: six questions in two parts — Part A (Q1–Q3, Process Mass & Energy Balances) and Part B (Q4–Q6, Chemical Thermodynamics). Candidates answer two from Part A and two from Part B; four equally-weighted questions (25 marks each) constitute a complete paper. All six are solved below for completeness. Property data are stated explicitly in each Given block.
Reference texts: Felder, Rousseau & Bullard, Elementary Principles of Chemical Processes (4th ed., Wiley) — combustion stoichiometry, humidity, recycle/purge and reactive material balances; Smith, Van Ness, Abbott & Swihart, Introduction to Chemical Engineering Thermodynamics (8th ed., McGraw-Hill) — reaction equilibrium, van’t Hoff analysis, VLE with ideal solutions and excess-property/heat-of-mixing energy balances; supporting data from Perry’s Chemical Engineers’ Handbook (9th ed.) and the NIST Chemistry WebBook.
