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

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

  1. Question 1 Soda-Ash Calciner with Dry Recycle
  2. Question 2 Combustion of Wood by Orsat Analysis
  3. Question 3 Heat of Reaction versus Temperature (Kirchhoff’s Law)
  4. Question 4 Fugacity of Liquid Hydrogen Chloride
  5. Question 5 Favourable T–P Region for Methanol Synthesis
  6. Question 6 Isopropanol–Benzene VLE at 45 °C

Start with Question 1 →

National Exams — December 2016 — 04-Chem-A1 Process Balances and Chemical Thermodynamics. Three-hour, open-book exam; any non-communicating calculator permitted. Format: two parts — Part A (Q1–Q3) Process Balances, Part B (Q4–Q6) Chemical Thermodynamics; the candidate answers two questions from each part (four constitute a complete paper, equal value). All six questions are solved below for completeness. Property data not printed on the paper (molar masses, critical constants, acentric factors, Rackett Zc) are stated explicitly in each Given block as open-book look-ups.

Reference texts: Felder, Rousseau & Bullard, Elementary Principles of Chemical Processes (4th ed., Wiley) — material balances, combustion/Orsat analysis, humidity; Himmelblau & Riggs, Basic Principles and Calculations in Chemical Engineering (8th ed.) — heats of reaction and Kirchhoff’s law; Smith, Van Ness, Abbott & Swihart, Introduction to Chemical Engineering Thermodynamics (8th ed., McGraw-Hill) — fugacity, generalized virial correlations, reaction equilibrium and VLE; supporting property data from Perry’s Chemical Engineers’ Handbook (9th ed.) and the NIST Chemistry WebBook.