The amount of energy required to break a bond is same as the amount of energy...
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The amount of energy required to break a bond is same as the amount of energy released when the same bond is formed. In gaseous state, the energy required for homolytic cleavage of a bond is called Bond Dissociation Energy (BDE) or Bond Strength. BDE is affected by s-character of the bond and the stability of the radicals formed. Shorter bonds are typically stronger bonds. BDEs for some bonds are given below: H₂C-H(g) H₂C (g) H(g) AH = 105 kcal mol-1 CI-CI (g) H₂C-Cl (g) H-Cl (g) Ci (g) + H₂C (g) + H*(g) + Cl (g) AH° = 58 kcal mol-¹ Ci (9) AH = 85 kcal mol-¹ ci (g) AH = 103 kcal mol-¹ Correct match of the C-H bonds (shown in bold) in Column J with their BDE in Column K is Column J Column K Molecule BDE (kel mol-¹) (P) H-CH(CH3)₂ (Q) H-CH₂Ph (R) H-CH=CH₂ (S) H-C=CH (A) P-iii, Q-iv, R-ii, S-I (C) P-iii, Q-ii, R-i, S-iv (1) 132 (ii) 110 (iii) 95 (iv) 88 (B) P-i, Q-ii, R - iii, S-iv (D) P-ii, Q-i, R-iv, S-iii The amount of energy required to break a bond is same as the amount of energy released when the same bond is formed. In gaseous state, the energy required for homolytic cleavage of a bond is called Bond Dissociation Energy (BDE) or Bond Strength. BDE is affected by s-character of the bond and the stability of the radicals formed. Shorter bonds are typically stronger bonds. BDEs for some bonds are given below: H₂C-H(g) H₂C (g) H(g) AH = 105 kcal mol-1 CI-CI (g) H₂C-Cl (g) H-Cl (g) Ci (g) + H₂C (g) + H*(g) + Cl (g) AH° = 58 kcal mol-¹ Ci (9) AH = 85 kcal mol-¹ ci (g) AH = 103 kcal mol-¹ Correct match of the C-H bonds (shown in bold) in Column J with their BDE in Column K is Column J Column K Molecule BDE (kel mol-¹) (P) H-CH(CH3)₂ (Q) H-CH₂Ph (R) H-CH=CH₂ (S) H-C=CH (A) P-iii, Q-iv, R-ii, S-I (C) P-iii, Q-ii, R-i, S-iv (1) 132 (ii) 110 (iii) 95 (iv) 88 (B) P-i, Q-ii, R - iii, S-iv (D) P-ii, Q-i, R-iv, S-iii
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