Elementary Principles 289

Elementary Principles 289 - 8.27 (cont'd) H = n H -n H i i...

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8- 10 Δ Hn H n H m m ii =−= + = = ∑∑ ±± . out in kg h 0 8504 3246 0 2 62 b. When cold water contacts hot gas, heat is transferred from the hot gas to the cold water lowering the temperature of the gas (the object of the process) and raising the temperature of the water. 8.28 2 ° C, 15% rel. humidity ⇒= = p HO 2 mm Hg mm Hg 015 5294 0 7941 .. . bg b g y inhaled 2 2 mol H O mol inhaled air dibg b g 0 7941 760 1045 10 3 ² . n inhaled 3 5500 ml 273 K 1 liter 1 mol min 275 K 10 ml 22.4 liters STP mol air inhaled min == 0 2438 Saturation at 37 ° C ° y p 2 2 C mm Hg mol H O mol exhaled dry gas * . . 37 760 47 067 760 00619 n 1 mol H 2 O(l)/min 22 o C n 2 kmol/min 37 o 0.0619 H 2 O 0.9381 dry gas 0.2438 mol/min 2 o 1.045 x 10 -3 H 2 0.999 dry gas Mass of dry gas inhaled (and exhaled) 0 2438 0 999 7 063 . b g mol dry gas 29.0 g min mol gm in Dry gas balance: 0999 0 2438 0 9381
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