Using the following data, give an approximation of the temperature at which the reaction CH4 (g) + 4 Cl2 (g) --- CCl4 (g) + 4 HCl (g) would be spontaneous and indicate what assumptions were made to elicit your answer.
Using the following data, give an approximation of the temperature at which the reaction CH4 (g) + 4 Cl2 (g) --- CCl4 (g) + 4 HCl (g) would be spontaneous and indicate what assumptions were made to elicit your answer.
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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Question
Using the following data, give an approximation of the temperature at which the reaction
CH4 (g) + 4 Cl2 (g) --- CCl4 (g) + 4 HCl (g)
would be spontaneous and indicate what assumptions were made to elicit your answer.
![(JK´'mol·1)
186.26
énergie moyenne
(kJ/mol)
432
427
liaisons
Molécule
S°m
CH4 (g)
CI (g)
Cl2 (g)
CCI4 (g)
CCI4 (1)
HCI (g)
HС (ag)
chimiques
H-H
H-CI
165.20
223.07
309.65
C-H
413
С —С
C = C
C-CI
347
216.40
614
186.91
339
56.5
CI-CI
239](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fdb039aed-b356-40cc-ba3e-936586ecb4b2%2F43909389-dbac-4ebc-8fdd-1f2bd1fcbd0d%2Fvwjxgwo_processed.jpeg&w=3840&q=75)
Transcribed Image Text:(JK´'mol·1)
186.26
énergie moyenne
(kJ/mol)
432
427
liaisons
Molécule
S°m
CH4 (g)
CI (g)
Cl2 (g)
CCI4 (g)
CCI4 (1)
HCI (g)
HС (ag)
chimiques
H-H
H-CI
165.20
223.07
309.65
C-H
413
С —С
C = C
C-CI
347
216.40
614
186.91
339
56.5
CI-CI
239
Expert Solution
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Step 1
According to second law of thermodynamics , entropy of a system always Increases. Or the value of entropy should be positive for an spontaneous process.
While if the entropy change value is negative , means system will tend to ordered manner, then Reaction is non spontaneous.
Given that -
CH4 (g) + 4Cl2 (g) ---> CCl4 (g) + 4HCl (g)
For this Reaction the entropy change for the Reaction can be calculated by -
∆S° = S°products - S°reactants
Also given that -
Entropies of substances are -
CH4(g) = 186.26 JK-1 mol-1
Cl2(g) = 223.07 JK-1 mol-1
CCl4(g) = 309.65 JK-1 mol-1
HCl(g) = 186.91 JK-1 mol-1
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