Explanation (a) For fluorine Δ H r x n for the reaction can be found as follows: Δ H r x n = Δ H B o n d s b r o k e n + Δ H B o n d s f o r m e d Δ H B o n d s b r o k e n = 4 [ H C − H ] + 2 [ H C − C ] + [ H F − F ] = 4 × 414 + 2 × 347 + 159 = 2509 kJ / m o l Δ H B o n d s F o r m e d = 4 [ H C − H ] + 2 [ H C − F ] = − [ 4 × 414 + 2 × 552 ] = − 2760 kJ / m o l Therefore, Δ H r x n = Δ H B o n d s b r o k e n + Δ H B o n d s f o r m e d = 2509 − 2760 = − 251 kJ / m o l (b) For chlorine Δ H r x n for the reaction can be found as follows: Δ H r x n = Δ H B o n d s b r o k e n + Δ H B o n d s f o r m e d Δ H B o n d s b r o k e n = 4 [ H C − H ] + 2 [ H C − C ] + [ H Cl − Cl ] = 4 × 414 + 2 × 347 + 243 = 2593 kJ / m o l Δ H B o n d s F o r m e d = 4 [ H C − H ] + 2 [ H C − Cl ] = − [ 4 × 414 + 2 × 339 ] = − 2334 kJ / m o l Therefore, Δ H r x n = Δ H B o n d s b r o k e n + Δ H B o n d s f o r m e d = 2593 − 2334 = 2 5 9 k J / m o l</

Chemistry: A Molecular Approach, Books a la Carte Edition (4th Edition)

4th Edition

ISBN: 9780134113593

Author: Nivaldo J. Tro

Publisher: PEARSON

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Chapter 9, Problem 15SAQ

Interpretation Introduction

To determine: Which halogen produces the most exothermic halogenation reaction with ethene. Consider the halogenation of ethane, where X is a generic halogen:

H2C=CH2(g)+X2(g)→H2CX−CH2X(g)

a) Fluorine

b) Chlorine

c) Bromine

d) Iodine

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Chapter 9, Problem 14SAQ

Chapter 9, Problem 1E

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Chapter 9 Solutions

Chemistry: A Molecular Approach, Books a la Carte Edition (4th Edition)

Ch. 9 - Prob. 1SAQ Ch. 9 - Q2. Which set of elements is arranged in order of...Ch. 9 - Q3. Which is the correct Lewis structure for...Ch. 9 - Q4. Which compound is likely to have an incomplete...Ch. 9 - Prob. 5SAQ Ch. 9 - Prob. 6SAQ Ch. 9 - Prob. 7SAQ Ch. 9 - Prob. 8SAQ Ch. 9 - Prob. 9SAQ Ch. 9 - Prob. 10SAQ

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Which halogen produces the most exothermic halogenation reaction with ethene. Consider the halogenation of ethane, where X is a generic halogen: H 2 C = CH 2 ( g ) + X 2 ( g ) → H 2 CX − CH 2 X ( g ) a) Fluorine b) Chlorine c) Bromine d) Iodine

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To determine: Which halogen produces the most exothermic halogenation reaction with ethene. Consider the halogenation of ethane, where X is a generic halogen: H2C=CH2(g)+X2(g)→H2CX−CH2X(g) a) Fluorine b) Chlorine c) Bromine d) Iodine

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Chapter 9 Solutions

To determine: Which halogen produces the most exothermic halogenation reaction with ethene. Consider the halogenation of ethane, where X is a generic halogen:

H2C=CH2(g)+X2(g)→H2CX−CH2X(g)

a) Fluorine

b) Chlorine

c) Bromine

d) Iodine