Theoretically, one can obtain zinc from an ore containing zinc sulfide, ZnS, by the reaction ZnS(s) Zn(s) + S(s) Show by calculation that this reaction is not feasible at 25°C. Substance AH, kJ/mol S, J/mol·K ZnS(s) -206.0 57.7 Zn(s) 41.6 S(s) 31.8 SO2(g) -296.8 248.1 O2(g) 205.0 a The standard free energy (AG°) can be calculated using AG = AH - TAS What is the value for AH? AH = kJ What is the value for AS? AS = J/K What is the value for AG? AGo kJ
Theoretically, one can obtain zinc from an ore containing zinc sulfide, ZnS, by the reaction ZnS(s) Zn(s) + S(s) Show by calculation that this reaction is not feasible at 25°C. Substance AH, kJ/mol S, J/mol·K ZnS(s) -206.0 57.7 Zn(s) 41.6 S(s) 31.8 SO2(g) -296.8 248.1 O2(g) 205.0 a The standard free energy (AG°) can be calculated using AG = AH - TAS What is the value for AH? AH = kJ What is the value for AS? AS = J/K What is the value for AG? AGo kJ
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:Theoretically, one can obtain zinc from an ore containing zinc sulfide, ZnS, by the reaction
ZnS(s) → Zn(s) + S(s)
Show by calculation that this reaction is not feasible at 25°C.
Substance AH, kJ/mol S°, J/mol·K
-206.0
57.7
ZnS(s)
Zn(s)
S(s)
41.6
0.
31.8
SO2(g)
02(8)
-296.8
248.1
0.
205.0
a The standard free energy (AG°) can be calculated using
AG = AH- TAS
What is the value for AH?
AH =
kJ
What is the value for AS°?
AS° =
J/K
What is the value for AG?
AG° =
kJ
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