2. Find OHo for the reaction 2H2(g) + 2C(s) + 02(g) C2H5OH(I), using the following thermochemical data. C2H5OH (I) + 2 02 (g) 2 CO2 (g) + 2 H2O (1) C (s) + 02 (g) →CO2 (g) H2 (g) + ½ 02 (g)H2O (1) AH = -875 kJ AH = -394.51 kJ AH = -285.8 kJ
2. Find OHo for the reaction 2H2(g) + 2C(s) + 02(g) C2H5OH(I), using the following thermochemical data. C2H5OH (I) + 2 02 (g) 2 CO2 (g) + 2 H2O (1) C (s) + 02 (g) →CO2 (g) H2 (g) + ½ 02 (g)H2O (1) AH = -875 kJ AH = -394.51 kJ AH = -285.8 kJ
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Hi! Can someone answer Learning task 4, no. 2? Thanks!
Transcribed Image Text:Applying Hess's Law
C2H4 (g) -> 2C (graphite) +2 H2 (g) AH = - 52.3 kJ/mol
2 C(graphite) + 3 H2 (g) –> C2H6 (g) AH = - 84.5 kJ/mol
C2H4 (g) + H2 (g) –> C2H6 (g) AH = - 136.8 kJ/mol
Learning Task 4:
Show your solution.
1. Calculate AH for the reaction 4 NH3 (g) + 5 02 (g) → 4 NO (g) + 6 H2O (g), from the following data.
AH = -180.5 kJ
AH = -91.8 kJ
N2 (g) + 02 (g) → 2 NO (g)
N2 (g) +3 H2 (g)→2 NH3 (g)
2 H2 (g) + 02 (g) → 2 H2O (g)
AH = -483.6 kJ
2. Find OH° for the reaction 2H2(g) + 2C(s) + 02(g) C2H5OH(I), using the following thermochemical data.
C2H5OH (I) + 2 02 (g) 2 CO2 (g) + 2 H2O (1)
C (s) + 02 (g)→ CO2 (g)
H2 (g) + ½ 02 (g) H2O (1)
AH = -875 kJ
AH = -394.51 kJ
AH = -285.8 kJ
3. Calculate AH for the reaction CH4 (g) + NH3 (g) HCN (g) +3 H2 (g), given:
N2 (g) +3 H2 (g) → 2 NH3 (g)
C (s) + 2 H2 (g)
H2 (g) + 2 C (s) + N2 (g) →2 HCN (g) AH = +270.3 kJ
AH = -91.8 kJ
CH4 (g)
AH = -74.9 kJ
4. Calculate DH for the reaction 2 Al (s) + 3 C12 (g)→2 AICI3 (s) from the following data.
2 Al (s) + 6 HCI (aq) 2 AIC13 (aq) + 3 H2 (g) AH = -1049. kJ
HCI (g)HCI (aq)
H2 (g) + C12 (g) → 2 HCI (g)
AICI3 (s)
AH = -74.8 kJ/mole
AH = -1845. kJ
AICI3 (aq)
AH = -323. kJ/mole
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