Consider the synthesis of ammonia from its elements at 25°C: N2(8) + 3H2(®) 2NH3(8) 2.1.1 Calculate A,G° , using only Gibbs energy values. 2.1.2 Calculate the equilibrium constant, K, at 25°C for this reaction 2.1.3 Calculate ASsurr for the synthesis of ammonia at 25ºC

Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter14: Chemical Equilibrium
Section: Chapter Questions
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2 Consider the synthesis of ammonia from its elements at 25°C:
N2(8) + 3H2(®)
→ 2NH3(g)
2.1.1 Calculate A,G° , using only Gibbs energy values.
2.1.2 Calculate the equilibrium constant, K, at 25°C for this reaction
2.1.3 Calculate ASsurr for the synthesis of ammonia at 25ºC
2.1.4 Calculate ASuniy for the synthesis of ammonia at 25°C
2.1.5 Calculate A,G at 25°C when the reaction mixture consists of 1.0 bar N2, 3.0 bar H2 and
0.50 bar NH3.
Thermodynamic Data
Species
So (J/K.mol)
(at 298.15 K)
A¡H• (kJ/mol)
A¡Gº (kJ/mol)
(at 298.15 K)
(at 298.15 K)
N2
191.56
H2
130.7
NH3
-45.90
192.77
-16.37
Transcribed Image Text:2 Consider the synthesis of ammonia from its elements at 25°C: N2(8) + 3H2(®) → 2NH3(g) 2.1.1 Calculate A,G° , using only Gibbs energy values. 2.1.2 Calculate the equilibrium constant, K, at 25°C for this reaction 2.1.3 Calculate ASsurr for the synthesis of ammonia at 25ºC 2.1.4 Calculate ASuniy for the synthesis of ammonia at 25°C 2.1.5 Calculate A,G at 25°C when the reaction mixture consists of 1.0 bar N2, 3.0 bar H2 and 0.50 bar NH3. Thermodynamic Data Species So (J/K.mol) (at 298.15 K) A¡H• (kJ/mol) A¡Gº (kJ/mol) (at 298.15 K) (at 298.15 K) N2 191.56 H2 130.7 NH3 -45.90 192.77 -16.37
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