23-Chem-A1 Process Balances and Chemical Thermodynamics: May 2018

National Exams — May 2018 — 16-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 Mass and Energy 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 volume of an ideal gas, the gas constant, air molar mass, the psychrometric ratio 0.622, and the gas-phase heat-capacity polynomials in the attached Table C-4) 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) — combustion/excess-air, humidity and drying energy balances; Himmelblau & Riggs, Basic Principles and Calculations in Chemical Engineering (8th ed.) — psychrometric and dryer balances; Smith, Van Ness, Abbott & Swihart, Introduction to Chemical Engineering Thermodynamics (8th ed., McGraw-Hill) — generalized virial fugacity, reaction-equilibrium ΔG°(T) from heat-capacity data, and residual/real-gas property changes; supporting property data from the attached Perry’s / Poling “Properties of Gases and Liquids” Table C-4.