# Enthalpy of polymerization

1. Oct 16, 2012

### utkarshakash

1. The problem statement, all variables and given/known data
The polymerization of ethylene to linear polyethylene is represented by the following reaction
$nCH_{2}=CH_{2} \rightarrow (-CH_{2}-CH_{2}-)_{n}$
where n=large integer value
Calculate the enthalpy of polymerization per mol of ethylene at 298K if average bond enthalpies of bond dissociation for C=C and C-C are 590 and 331kJ/mol respectively

2. Relevant equations

3. The attempt at a solution

For one mole
$ΔH_{poly} = BDE of C=C+4\times BDE C-H - BDE of C-C - 4\times BDE C-H$
=590-331
=259

But this is not correct.

2. Oct 17, 2012