Elementary Principles 291

# Elementary Principles 291 - 8.30 (cont'd) References: H2O...

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8- 12 Re ferences: H 2 O (l, 25 o C), Air (v, 25 o C) substances ± n in (mol/s) ² H in (kJ / mol) ± n out ² H out (kJ / mol) dry air 25.2 14.37 25.2 Cd T p air T di 25 z H 2 O(v) 1.0 T H T p HOl vap p HOv 2 2 25 100 100 500 () ² z z + 7.1 T H T p vap p T 2 2 25 100 100 ² z z + H 2 O(l) 6.1 0 -- -- Δ Hn H n H C dT C dT H C dT T H T out out in in p air T p vap p T p vap p == − ⋅ F H G I K J ++ + F H G I K J −− + + F H G I K J = zz z 0 252 71 252 14 37 100 0 25 25 100 100 25 100 100 500 22 ± ² ± ² .. ² . ² ( ) bg di bg b g Integrate, solve : T = 139 o C b. () () () () 2 139 139 500 500 25.2 1.00 290 kW pp air H O v QC d T C d T =− ∫∫ ± This heat goes to vaporize the entering liquid water and bring it to the final temperature
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## This note was uploaded on 02/27/2012 for the course CHEMICAL E 312 taught by Professor Cheung during the Fall '11 term at The University of Akron.

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