Elementary Principles 432 - 9.63 (cont'd) Theoretical...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
9- 80 b. Theoretical oxygen 2 mol O 82 mol CH 1 mol CH 3.5 mol O 18 mol C H 1 mol C H mol O 24 4 22 6 26 2 =+ = 227 Air fed : n 1 129714 = × = 1.2 227 mol O 1 mol air 0.21 mol O mol air 2 2 . C balance : nn 82 00 1 18 00 2 118 00 =+⇒ = .. . bg b g b g mol CO 2 H balance : 2 82 00 4 18 00 6 218 00 33 = . b g b g mol H O 2 20% excess air, complete combustion ⇒= = n 42 02 227 4540 b g mol O mol O 2 N balance : mol N n 5 0 79 129714 1024 63 == . b g Extents of reaction : ξξ 11 82 18 = = CH C H 6 mol, mol Reference states: CH g , C H g , N g , O g , H O l at 298 K 6222 (We will use the values of Δ ± H c o given in Table B.1, which are based on HOl 2 as a combustion product, and so must choose the liquid as a reference state for water.) ± ± , HT C T HC T ip i p b g b g =− 298 298 298 K for all species but water K K for water v,H O H O Substance mol kJ mol mol kJ mol CH CH O N CO HOv in in out out 4 2 2 2 n H n H T T T T ±± . . . . . . . 82 00 1800 0 272 40 414 0 0331 298 1024 63 391 1024 63 0 0313 298 118 00 0 0500 298 218 00 44 013 0 0385 298 2 −− + b g Energy balance : Δ H = 0 12 0 ΔΔ ± ± H H nH ii c o CH c o out
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.
Ask a homework question - tutors are online