Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)
National Exams — May 2017 — 16-Chem-A3 Heat and Mass Transfer. Three-hour, open-book exam; one textbook and any non-communicating calculator permitted. Format: two parts of three problems each (Part A — Heat Transfer, Part B — Mass Transfer), all problems worth 25 points; candidates attempt at least two per part and only the first two per part are marked. The six problems are renumbered 1–6 and all are solved below for completeness. Property data are taken from the problem statements and standard open-book tables (the paper supplies the air-property table A-9); values used are stated in each Given block.
Reference texts: Incropera, DeWitt, Bergman & Lavine, Fundamentals of Heat and Mass Transfer (Wiley) — conduction resistances, critical radius, fins, convection correlations; Coulson & Richardson, Chemical Engineering Vol. 1 (Butterworth-Heinemann) — the packed-bed, distillation and sublimation problems of this style; Treybal, Mass-Transfer Operations (3rd ed., McGraw-Hill) — differential distillation and gas adsorption; Geankoplis, Transport Processes and Separation Process Principles (4th ed., Prentice Hall) — packed-bed and convective mass-transfer coefficients; supporting data from Perry's Chemical Engineers' Handbook (9th ed.) and the paper's Table A-9 (properties of air).
