23-Chem-A3 Heat and Mass Transfer: December 2017

National Exams — December 2017 — 16-Chem-A3 Heat and Mass Transfer. Three-hour, open-book exam (one textbook of the candidate’s choice; any non-communicating calculator). Format: two parts — Part A — Heat Transfer (Q1–Q3) and Part B — Mass Transfer (Q4–Q6). All problems are worth 25 points; the rubric requires at least two problems attempted from each part and marks only the first two per part, so a complete paper is four questions (100 points). All six problems are solved below for completeness. Property data are quoted as stated in each problem; where a value applies to a film condition it is used at the stated film temperature.

Reference texts: F. P. Incropera & D. P. DeWitt, Fundamentals of Heat and Mass Transfer (Wiley) — free/forced convection correlations, conduction shape factors, the heat–mass-transfer analogy; J. P. Holman, Heat Transfer (McGraw-Hill) — natural-convection constants $C,m$ and cylinder conduction; R. E. Treybal, Mass-Transfer Operations (McGraw-Hill) — wetted-wall $k_G$, gas absorption and the Chilton–Colburn analogy; R. B. Bird, W. E. Stewart & E. N. Lightfoot, Transport Phenomena (Wiley); supporting property data from Perry’s Chemical Engineers’ Handbook (9th ed.).