Question

The dissociation energy of ch4 is 400k.cal mol and that of ethane is 670k.cal mol. The c-c bond energy is?
(want answer with explanation) ​

Answer 1

Answer:

95 kcal/mol

Explanation:

Answer 2

70k.calmol

Explanation:

• It is given that the dissociation energy of ch4 is 400k.cal mol.As Ch4 has four c-h bonds energy of dissociation for each bond would be 100 k.cal mol.

• We are asked to find the energy of c-c bond in ethane.The empiracal formula for ethane is,

$C_{2}H_{6}$

• We see that ethane has one c-c bond and six c-h bonds.It is given that ethane has a dissociation energy of 670k.cal mol.

• From information given in methane's bond energies eaxh c-h bond has a energy of 100k.cal mol .

• So we get the equation,

$x+6*100k=670k\\\\x=70k.calmol$

Hence this is the total bond energy of c-c in ethane.