Directions: Calculate AG°, AH°, AS° then predict whether the reaction is spontaneous. 1. Consider the following reaction: N2(g) + 3H2(g) - 2NH3(g) AH = - 92.4 kJ/mol (a) The absolute entropy values, S. at 238 K for N2(g), H2(g) and NH3(g) are 192 J/Kmol, 131 J/Kmol and 193 J/Kmol respectively. Calculate AS° for the reaction and explain the sign of AS°. (b) Calculate AG° for the reaction at 238 K. State and explain whether the reaction is spontaneous.
Directions: Calculate AG°, AH°, AS° then predict whether the reaction is spontaneous. 1. Consider the following reaction: N2(g) + 3H2(g) - 2NH3(g) AH = - 92.4 kJ/mol (a) The absolute entropy values, S. at 238 K for N2(g), H2(g) and NH3(g) are 192 J/Kmol, 131 J/Kmol and 193 J/Kmol respectively. Calculate AS° for the reaction and explain the sign of AS°. (b) Calculate AG° for the reaction at 238 K. State and explain whether the reaction is spontaneous.
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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Spontaneity and Gibbs’ Free Energy
Calculate ∆G^ο, ∆H^ο, ∆S^ο then predict whether the reaction is spontaneous.
Consider the following reaction: N2(g) + 3H2(g) → 2NH3(g) ΔH = - 92.4 kJ/mol
(a) The absolute entropy values, S, at 238 K for N2(g), H2(g) and NH3(g) are 192
J/Kmol, 131 J/Kmol and 193 J/Kmol respectively. Calculate ∆S^o for the reaction and explain the sign of ∆S^ο
.
(b) Calculate ∆G^ο for the reaction at 238 K. State and explain whether the reaction is spontaneous.
please show your solutions
Transcribed Image Text:Directions: Calculate AG°, AH°, AS° then predict whether the reaction is
spontaneous.
1.
Consider the following reaction:
N2(g) + 3H2(g) - 2NH3(g)
AH = - 92.4 kJ/mol
(a) The absolute entropy values, S. at 238 K for N2(g), H2(g) and NH3(g) are 192
J/Kmol, 131 J/Kmol and 193 J/Kmol respectively. Calculate AS° for the reaction
and explain the sign of AS°.
(b) Calculate AG° for the reaction at 238 K. State and explain whether the reaction
is spontaneous.
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