Question

4. The enthalpy of formation of ethanol (C2H5OH (g)) is -235,310 kJ/kmol at the reference state. Ethanol and air enter an adiabatic combustor at 25 °C and 100 kPa, and complete combustion with 200% excess air occurs. Determine the final temperature of the combustion products.

Answer 1

2 Hs ON C2 60 Carebon alance Ja 2 Hydrojen balan ce, 2be 6 b 3 O1n alance, 2 a + b c- Pat the value ob in eg0 200,t2 H,0 CO 30 Now ombustion w.th 00 Theoniti cel stichoime tnic ain:- 213t3 C)C3 316 Now tom buston cwith 200 x cess An Jn adiabesic on duston , linal tempenadunc of t combustianpns Aueds tha fires lay Ato nJ- eChto tAh)c (to C 9) = 235310 KT/Kmol R 2 Hp 2. C-393522+ Ah cg) t 3C-241827 + Ah0)t 6 dempenctune cuich is ton puted h iod a diabeic flame The exi! lte enno tempeadune saliby he a bavc Te 000k Wp 2 C-33522t 33405)t 3C-24182 25qf8) t 6 22101 + 33.8 C21460 /kmod -505333 K

Te 1200 k 2C-293522 t qq 48) +3C-241 821 t3 44t6) t(6 29165) f (33-84x 28108) KEmo Tea 190364 Line an inten poldion ethn SO5333 235210 1200h 10364 3- G-SO52?) C 1200-j000) C-235310 000 t C-So5333 - 1q0364 ESS