The standard enthalpy of atomization of ethane according to the equation C ₂ H ₆( ~g ) 2 C ( g )+6 H ( g ) is 622 ~kJ ~mol ⁻¹ . If standard mean C - H bond dissociation enthalpy is 90 ~kJ mol ⁻¹ , the standard mean dissociation enthalpy of

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The standard enthalpy of atomization of ethane according to the equation C ₂ H ₆( ~g ) 2 C ( g )+6 H ( g ) is 622 ~kJ ~mol ⁻¹ . If standard mean C - H bond dissociation enthalpy is 90 ~kJ mol ⁻¹ , the standard mean dissociation enthalpy of C - C bond (in kJ mol ⁻¹ ) is

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Correct answer: D. 82

aligned & _ a H ^ = _ C - H H ^ + _ C - C H ^ & 622=[6 90]+ [ _ C - C H ^ ]=540+ _ C - C H ^ & _ C - C H ^ =622-540=82 ~kJ ~mol ⁻¹ aligned

The standard enthalpy of atomization of ethane according to the equation C ₂ H ₆( ~g ) 2 C ( g )+6 H ( g ) is 622 ~kJ ~mol ⁻¹ . If standard mean C - H bond dissociation enthalpy is 90 ~kJ mol ⁻¹ , the standard mean dissociation enthalpy of C - C bond (in kJ mol ⁻¹ ) is

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