Elementary Principles 379 - 9.25 a. CH 4 ( g) + O 2 ( g)...

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9- 27 9.25 a. CH g) O g) HCHO(g) + H O(g) 42 2 (( +→ 10 L, 200 kPa n 3 (mol HCHO) n 0 (mol feed gas) at 25 ° C n 4 (mol H 2 O) 0.85 1 mol CH 4 /mol n 5 (mol CH 4 ) 0.15 mol O 2 /mol T ( ° C), P(kPa), 10L Q (kJ) Basis kPa 1000 Pa 10 L 10 m mol K 1 kPa 1 L 8.314 m Pa K mol feed gas mixture 3 3 : . n 0 3 200 1 298 08072 = = ., mol feed gas mixture (0.85)(0.8072) = 0.6861 mol CH (0.15)(0.8072) = 0.1211 mol O 4 2 CH consumed : 1 mol CH 0.1211 mol O fed mol O fed mol CH mol CH mol CH 4 2 4 44 1 01211 0 6861 01211 05650 5 = ⇒= = . (. . ) . n HCHO produced : mol HCHO mol CH consumed 1 mol CH consumed mol HCHO 4 4 n 3 1 01211 01211 == . . H O produced : mol H O mol H O Extent of reaction : mol 2 24 4 2 Oo u t Oi n O 22 2 n nn 4 1 01211 01211 00 1 2 1 1 1 = = = . . () . . ξ ν References : CH g) O g), HCHO(g), H O(g), at 25 C 2 o (, ( Substance mol kJ mol mol kJ mol CH O HCHO HO in in out out 4 2 n U n
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