Elementary Principles 356

# Elementary Principles 356 - 9.8 a. b. e H j = -385.76 +...

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9- 4 9.8 9.9 a. b. c. a. b. c. d. ΔΔ Δ Δ ±± ± ± .. . () ( ) HH H H r o f o CHC l l f o CH g f o 22 4 24 kJ mol 1 38576 52 28 33348 =− ⇒= + = ej Δ Δ ± ± . . ) H H r o f o f o HCl g f o l( l 23 2 2 4 kJ mol 2 276 2 92 31 33348 3503 =+ = + = bg b g Given reaction =+⇒ = 1 2 38576 3503 420 79 bg b g . k J m o l ²² . . QH == × Δ 300 mol C HCl kJ hm o l kJ h kW 42079 126 10 35 5 Heat is evolved. C H O CO ( ) + H O( ) 22 2 2 2 ± . gg gl k J m o l c o +→ = 5 2 21 2 9 9 6 Δ H The enthalpy change when 1 g-mole of C 2 H 2 (g) and 2.5 g-moles of O 2 (g) at 25 ° C and 1 atm react to form 2 g-moles of CO 2 (g) and 1 g-mole of H 2 O(l) at 25 ° C and 1 atm is -1299.6 kJ. Δ Δ ± ± ... . H H c o f o CO g f o HOl f o 2 2 Table B.1 kJ mol kJ mol + = B 2 2 3935 28584 226 75 1299 6 b g ( ± . ( ± ± .( . ) . . i) kJ mol kJ mol ii) kJ mol kJ mol r o f o f o r o c o c o g c o 26 Table B.1 Table B.1 Δ Δ Δ H H H = +− = B B di 84 67 226 75 3114 2 1299 6 2 28584 1559 9 H 2 C H O CO ( ) + H O( ) (1) H O H O( ) (2) C H O CO ( ) + 3H O( ) (3) 2 2 2 2 2 2 2 ± . ± . ± . k J m o l l k J m o l g l k J m o l c o c
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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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