What effect does convection have on evaporation if you leave a petri dish of agar in the fume hood instead of uncovered on the bench (both dry air at 293 K and 1.013 x 105Pa), when you compare mass transfer coefficients (kc fumehood Vs kc_room) and kc_rfumehood). Water evaporates from the exposed area into the still lab air at a rate of 5.73 x 10-6 mole/s (WA_room). In the fume hood, it evaporates into a dry air stream at a rate of 2.29 x 104 mole/s (WA_Fumehood). O No difference O About 2.5 times more O About 10 times more O About 25 times more O About 40 times more
What effect does convection have on evaporation if you leave a petri dish of agar in the fume hood instead of uncovered on the bench (both dry air at 293 K and 1.013 x 105Pa), when you compare mass transfer coefficients (kc fumehood Vs kc_room) and kc_rfumehood). Water evaporates from the exposed area into the still lab air at a rate of 5.73 x 10-6 mole/s (WA_room). In the fume hood, it evaporates into a dry air stream at a rate of 2.29 x 104 mole/s (WA_Fumehood). O No difference O About 2.5 times more O About 10 times more O About 25 times more O About 40 times more
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:What effect does convection have on evaporation if you leave a petri dish of agar in the fume hood instead of uncovered on the bench (both dry air at 293 Kand 1.013 x 10PPA), when you
compare mass transfer coefficients (kc fumehood Vs kc room) and kc rfumehood). Water evaporates from the exposed area into the still lab air at a rate of 5.73 x 10-6 mole/s (WA room). In
the fume hood, it evaporates into a dry air stream at a rate of 2.29 x 104 mole/s (WA Fumehood).
O No difference
O About 2.5 times more
O About 10 times more
O About 25 times more
O About 40 times more
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