Consider the reaction: 2H₂O(1) 2H₂(g) + O₂(g) Using standard thermodynamic data at 298K, calculate the entropy change for the surroundings when 1.81 moles of H₂O(1) react at standard conditions. AS° surroundings = J/K

Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter18: Principles Of Chemical Reactivity: Entropy And Free Energy
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Consider the reaction:
2H₂O(1) 2H₂(g) + O₂(g)
Using standard thermodynamic data at 298K, calculate the entropy change for the surroundings when 1.81 moles of H₂O(1) react at standard conditions.
AS°
surroundings
=
J/K
Transcribed Image Text:Consider the reaction: 2H₂O(1) 2H₂(g) + O₂(g) Using standard thermodynamic data at 298K, calculate the entropy change for the surroundings when 1.81 moles of H₂O(1) react at standard conditions. AS° surroundings = J/K
Hydrogen
H₂ (g)
H (g)
Ht (g)
H+ (aq)
OH(aq)
H₂O (1)
H₂O (g)
H₂O₂ (1)
Oxygen
O₂ (g)
O(g)
03 (g)
AHºf (kJ/mol) AG°f (kJ/mol)
0
0
218.0
203.2
1536.2
0
-230.0
-157.0
-285.8
-237.1
-241.8
-228.6
-187.8
-120.4
AHºf (kJ/mol) AG°f (kJ/mol)
0
0
249.2
231.7
142.7
163.2
Sº (J/mol K)
130.7
114.7
-11.0
69.9
188.8
109.6
Sº (J/mol K)
205.1
161.1
238.9
Transcribed Image Text:Hydrogen H₂ (g) H (g) Ht (g) H+ (aq) OH(aq) H₂O (1) H₂O (g) H₂O₂ (1) Oxygen O₂ (g) O(g) 03 (g) AHºf (kJ/mol) AG°f (kJ/mol) 0 0 218.0 203.2 1536.2 0 -230.0 -157.0 -285.8 -237.1 -241.8 -228.6 -187.8 -120.4 AHºf (kJ/mol) AG°f (kJ/mol) 0 0 249.2 231.7 142.7 163.2 Sº (J/mol K) 130.7 114.7 -11.0 69.9 188.8 109.6 Sº (J/mol K) 205.1 161.1 238.9
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