PROBLEM: Choose the member with the higher entropy in each of the following pairs, and justify your choice [assume constant temperature, except in part (e)]: (a) 1 mol of SO₂(g) or 1 mol of SO3(g) (b) 1 mol of CO₂(s) or 1 mol of CO₂(g) (c) 3 mol of O₂(g) or 2 mol of O3(g) (d) 1 mol of KBr(s) or 1 mol of KBr(aq) seawater at 2°C or at 23°C (e) (f) 1 mol of CF4(g) or 1 mol of CCl4(9)

Physical Chemistry
2nd Edition
ISBN:9781133958437
Author:Ball, David W. (david Warren), BAER, Tomas
Publisher:Ball, David W. (david Warren), BAER, Tomas
Chapter3: The Second And Third Laws Of Thermodynamics
Section: Chapter Questions
Problem 3.51E: Order the following substances in order of increasing entropy: NaCl(solid), C(graphite), C(diamond),...
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PROBLEM: Choose the member with the higher entropy in each of the
following pairs, and justify your choice [assume constant
temperature, except in part (e)]:
(a) 1 mol of SO₂(g) or 1 mol of SO3(g)
(b)
1 mol of CO₂ (s) or 1 mol of CO₂(g)
3 mol of O₂(g) or 2 mol of O3(g)
(c)
(d)
1 mol of KBr(s) or 1 mol of KBr(aq)
seawater at 2°C or at 23°C
(e)
(f) 1 mol of CF₂(g) or 1 mol of CCl4 (9)
PROBLEM: A key step in the production of sulfuric acid is the oxidation
of SO₂(g) to SO3(g):
2SO₂(g) + O₂(g) → 2SO3(g)
At 298 K, AG = -141.6 kJ; AH = -198.4 kJ; and AS = -187.9 J/K
(a) Use the data to decide if this reaction is spontaneous at 25°C, and
predict how AG will change with increasing T.
(b) Assuming AH and AS are constant with increasing T, is the
reaction spontaneous at 900.° C?
PROBLEM:
ΔΗ = 58.1 kJ
At 25°C (298 K), the reduction of copper(1) oxide is
nonspontaneous AG = 8.9 kJ). Calculate the temperature
at which the reaction becomes spontaneous.
AS = 0.165 kJ/K
Transcribed Image Text:PROBLEM: Choose the member with the higher entropy in each of the following pairs, and justify your choice [assume constant temperature, except in part (e)]: (a) 1 mol of SO₂(g) or 1 mol of SO3(g) (b) 1 mol of CO₂ (s) or 1 mol of CO₂(g) 3 mol of O₂(g) or 2 mol of O3(g) (c) (d) 1 mol of KBr(s) or 1 mol of KBr(aq) seawater at 2°C or at 23°C (e) (f) 1 mol of CF₂(g) or 1 mol of CCl4 (9) PROBLEM: A key step in the production of sulfuric acid is the oxidation of SO₂(g) to SO3(g): 2SO₂(g) + O₂(g) → 2SO3(g) At 298 K, AG = -141.6 kJ; AH = -198.4 kJ; and AS = -187.9 J/K (a) Use the data to decide if this reaction is spontaneous at 25°C, and predict how AG will change with increasing T. (b) Assuming AH and AS are constant with increasing T, is the reaction spontaneous at 900.° C? PROBLEM: ΔΗ = 58.1 kJ At 25°C (298 K), the reduction of copper(1) oxide is nonspontaneous AG = 8.9 kJ). Calculate the temperature at which the reaction becomes spontaneous. AS = 0.165 kJ/K
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