Which Is the Correct Increasing Order of Bond Dissociation Enthalpy of the C-X Bond?

By Team Aakash Byju's | 13th November 2022

[{"selector":"#anim-c9ccc7dc-7890-47fe-9a35-24f0d43f9c35","keyframes":{"opacity":[0,1]},"delay":0,"duration":1200,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-1b359af6-f42f-4043-9179-c23f980f25bf","keyframes":{"transform":["translate3d(-255.24476%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":1200,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-a49194f9-2130-4515-a3e4-83702b96064d","keyframes":{"opacity":[0,1]},"delay":0,"duration":1200,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-d8656d17-a297-4f7c-911f-6925de86a7f4","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":1200,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] [{"selector":"#anim-6a413a02-2d52-491e-af1f-0eeacf85317e","keyframes":{"opacity":[0,1]},"delay":0,"duration":1200,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-a1f766ee-7b3a-41cb-a4f0-a4cb41aeb8cb","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":1200,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] The correct answer is D. C–I, C–Br, C–Cl, C–F . Brief Explanation

[{"selector":"#anim-903c0b58-6422-4055-82c5-f4b46b201b8f","keyframes":{"opacity":[0,1]},"delay":0,"duration":1200,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-06992b5d-3cd1-449d-af55-ab547eb0be53","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":1200,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] Bond enthalpy defines the amount of energy stored in a bond between atoms in a molecule.

[{"selector":"#anim-03f7752a-9649-41c9-bb66-d8738fcfd6f8","keyframes":{"opacity":[0,1]},"delay":0,"duration":1200,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-ac6d59b0-3b80-4a06-a6aa-ee86c6eb34b2","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":1200,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] [{"selector":"#anim-7f4dcf24-3257-44d1-bd69-08f372a2bb2a","keyframes":{"opacity":[0,1]},"delay":0,"duration":1200,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-bccbde1b-5fd9-491f-82c8-be2210901b7e","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":1200,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] [{"selector":"#anim-1357ba37-c507-4008-ae64-745fa8e6741e","keyframes":{"opacity":[0,1]},"delay":0,"duration":1200,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-cd9fa970-46ec-4846-9df6-0aa8a50e8f7e","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":1200,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] [{"selector":"#anim-76880942-6c93-4439-8d9d-c7dd2e11bd8f","keyframes":{"opacity":[0,1]},"delay":0,"duration":1200,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-75e9eb56-530f-431c-bebc-34e2dfb259aa","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":1200,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] [{"selector":"#anim-1ad291b9-9015-4c78-99db-8fbd19caa20d","keyframes":{"opacity":[0,1]},"delay":0,"duration":1200,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-11a9bc6f-53ce-4aa8-ac97-74fc9c68621f","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":1200,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] [{"selector":"#anim-ef9640c4-7eb2-4047-a389-126b4e15fbf4","keyframes":{"opacity":[0,1]},"delay":0,"duration":1200,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-211d4097-b808-4211-9da6-ef9aab7e8ff8","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":1200,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] Bond dissociation enthalpy increases as bond multiplicity decreases. Unpaired Valence Electrons Sharing of Available Valence Electrons Atom 1 Atom 2 Covalent Molecule

Table for Average Bond Length for Some Covalent Bonds

[{"selector":"#anim-56985f0a-304b-4bfa-8bf0-d614cd7cb4e5","keyframes":{"opacity":[0,1]},"delay":0,"duration":1200,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-00d2027c-4cd1-4cd5-b4ea-e31853346849","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":1200,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] [{"selector":"#anim-4cba5cba-cccf-4f79-95fc-cabd53e22c02","keyframes":{"opacity":[0,1]},"delay":0,"duration":1200,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-89f863e4-d6d8-4a77-9c1b-00dd366a688c","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":1200,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] The high bond length in C-I results in lower bond strength and bond dissociation enthalpy. 135 177 194 214 C-F C-Cl C-Br C-I Length C-X Bond

Table for Average Bond Dissociation Enthalpies for Some Covalent Bonds

[{"selector":"#anim-36722594-bc66-4a7f-8fb8-ee8c131ad167","keyframes":{"opacity":[0,1]},"delay":0,"duration":1200,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-91f645ea-60b4-461e-83cb-3b51f157e09a","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":1200,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] [{"selector":"#anim-3b02100f-d2fe-4b63-a794-a0b773c5d708","keyframes":{"opacity":[0,1]},"delay":0,"duration":1200,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-292689bf-d0bc-4a40-9424-2e43ac287674","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":1200,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] C-F has a high bond dissociation enthalpy due to its short bond length. C-Br C-Cl C-F 270 240 C-I 330 450 Bond dissociation enthalpies /KJ mol-1 C-X Bond

Table for Average Bond Dissociation Enthalpies for Some Covalent Bonds

[{"selector":"#anim-ec0b2efd-37b6-4cdd-a405-96578cd583cb","keyframes":{"opacity":[0,1]},"delay":0,"duration":1200,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-23c6a613-704b-4f4c-b372-8a7cb00c70d2","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":1200,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] [{"selector":"#anim-fa04fefd-5096-4def-a11e-0eb0beafe291","keyframes":{"opacity":[0,1]},"delay":0,"duration":1200,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-5e58754a-f4c0-4d3d-9459-5fdf76a5cc49","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":1200,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] As a result, the bond dissociation enthalpies are in the following order: C−I<C−Br<C−Cl<C−F. C-Br C-Cl C-F 270 240 C-I 330 450 Bond dissociation enthalpies /KJ mol-1 C-X Bond

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Which Is the Correct Increasing Order of Bond Dissociation Enthalpy of the C-X Bond?

A.

B.

C.

D.

C–F, C–Cl, C–Br, C–l

C–I, C–F, C–Cl, C–Br

C–I, C–Br, C–Cl, C–F

C–Cl, C–F, C–Br, C–I

Table for Average Bond Length for Some Covalent Bonds

Table for Average Bond Dissociation Enthalpies for Some Covalent Bonds

Table for Average Bond Dissociation Enthalpies for Some Covalent Bonds

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