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23-Chem-A1 Process Balances and Chemical Thermodynamics: May 2016

Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)

  1. Question 1 Iron Blast-Furnace Charge and Slag Balance
  2. Question 2 Standard Heat of Reaction for Toluene Oxidation
  3. Question 3 Crystallization and Rotary-Filter Entrainment
  4. Question 4 Calcination of Sodium Bicarbonate — Reaction Equilibrium
  5. Question 5 Ethanol–Benzene Azeotrope from a Single Tie Line
  6. Question 6 Gas-Phase Decomposition Equilibrium in a Rigid Vessel

Start with Question 1 →

National Exams — May 2016 — 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/metallurgical stoichiometry, tie-substance balances and reactive mass balances; Himmelblau & Riggs, Basic Principles and Calculations in Chemical Engineering (8th ed., Prentice Hall) — ore/metallurgical balances and heat-of-reaction bookkeeping; Smith, Van Ness, Abbott & Swihart, Introduction to Chemical Engineering Thermodynamics (8th ed., McGraw-Hill) — reaction equilibrium, van’t Hoff analysis and VLE with activity coefficients; supporting data from Perry’s Chemical Engineers’ Handbook (9th ed.) and the NIST Chemistry WebBook.