Elementary Principles 438 - 9.67 (cont'd) b. Reference...

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9- 86 b. c. Reference states: CH g , N g , O g , H O l , CO (g) at 25 C 4222 2 o bg (We will use the values of Δ ± H c 0 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.) Substance mol kJ mol mol kJ mol CH O N CO HOv in in out out 4 2 2 n U n U U U U U ±± . .. ± ± . ± . ± 100 0 260 0 060 9 7 809 7 8 200 21 22 3 4 −− ± () ± ± ). ± (. . ) ( ) . ) ± . ) ( ) UC R T U C RT H R T CR UTT UT T ip pp pi =− =+ = + × = × = B Part a g2 v o gv o gr e f g 2 g )( for all species except H O(v) C )( C )( for H O(v) Substituting given values of ( and kJ / mol yields 10 kJ / mol kJ / mol 10 kJ / mol 25 25 25 25 25 8 314 10 0 033 8 314 25 0 02469 0 6172 0 032 8 314 25 0 02369 0 3 1 3 2 3 ΔΔ ej .) 5922 kJ / mol ± . ) ( ) . ) 3 3 0 052 8 314 25 0 04369 10922 × = 10 kJ / mol kJ / mol ± ( . . ) ( ) 4 33 44 01 8 314 0 040 8 314 25 × F H G I K J L N M O Q P −× kJ mol 10 kJ mol K (298 K) + 10 kJ mol ⇒= × = ± .( . ( ) ( . . ) T 4 3 4153 0 052 8 314 25 0 03167
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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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