1. Calculate the enthalpy change for the following reaction. Tell whether the reaction is exothermic or endothermic. Explain. 2 HgOg) + 2Hgn + Oze 2. Calculate the entropy change for the following reaction. Describe quantitatively the change in the entropy for the reaction. 2 Zno) + Oze -2 ZnO(s) 3. Calculate the standard free-energy change for the following reaction at 25°C. Is the reaction spontaneous in the forward direction? Justify. 2 C;Ho(g) +7 Oze 4 COe) + 6 H;O Substance AH? (kJ/mol) AG (kJ/mol) S J/K• mol) CO.(g) - 393.5 - 394.4 213.6 H,0() -285.8 -237.2 69.9 CHs -84.7 -32.89 229.5 0:() 205.0 Zn(s) 41.6 ZnO(s) -348.0 -318.2 43.9 Hg 75.8 HgO -90 70
1. Calculate the enthalpy change for the following reaction. Tell whether the reaction is exothermic or endothermic. Explain. 2 HgOg) + 2Hgn + Oze 2. Calculate the entropy change for the following reaction. Describe quantitatively the change in the entropy for the reaction. 2 Zno) + Oze -2 ZnO(s) 3. Calculate the standard free-energy change for the following reaction at 25°C. Is the reaction spontaneous in the forward direction? Justify. 2 C;Ho(g) +7 Oze 4 COe) + 6 H;O Substance AH? (kJ/mol) AG (kJ/mol) S J/K• mol) CO.(g) - 393.5 - 394.4 213.6 H,0() -285.8 -237.2 69.9 CHs -84.7 -32.89 229.5 0:() 205.0 Zn(s) 41.6 ZnO(s) -348.0 -318.2 43.9 Hg 75.8 HgO -90 70
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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Transcribed Image Text:1. Calculate the enthalpy change for the following reaction. Tell whether the reaction is
exothermic or endothermic. Explain.
2 HgO
+ 2Hg + Oze)
2. Calculate the entropy change for the following reaction. Describe quantitatively the
change in the entropy for the reaction.
2 Zne) + Oze) –2 ZnO(s)
3. Calculate the standard free-energy change for the following reaction at 25°C. Is the
reaction spontaneous in the forward direction? Justify.
2 C;Ho(g) +7 O2 4 CO2 + 6 H;O)
Substance
AH? (kJ/mol)
AG (kJ/mol)
S J/K • mol)
CO.(g)
- 393.5
- 394.4
213.6
H,0()
-285.8
-237.2
69.9
C,H6
-84.7
-32.89
229.5
0:(g)
205.0
| Zn(s)
41.6
ZnO(s)
-348.0
-318.2
43.9
Hg
75.8
HgO
-90
70
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