Using the following data, give an approximation of the temperature at which the reactionCH4 (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)186.26énergie moyenne(kJ/mol)432427liaisonsMoléculeS°mCH4 (g)CI (g)Cl2 (g)CCI4 (g)CCI4 (1)HCI (g)HС (ag)chimiquesH-HH-CI165.20223.07309.65C-H413С —СC = CC-CI347216.40614186.9133956.5CI-CI239

Answered: Using the following data, give an…

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

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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

Expert Solution

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 -

CH_4(g)= 186.26 JK^-1 mol^-1

Cl_2(g)= 223.07 JK^-1 mol^-1

CCl_4(g)= 309.65 JK^-1 mol^-1

HCl_(g)= 186.91 JK^-1 mol^-1