Enthalpy of polymerization

  • #1
utkarshakash
Gold Member
855
13

Homework Statement


The polymerization of ethylene to linear polyethylene is represented by the following reaction
[itex]nCH_{2}=CH_{2} \rightarrow (-CH_{2}-CH_{2}-)_{n}[/itex]
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

Homework Equations



The Attempt at a Solution



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

But this is not correct.
 

Answers and Replies

  • #2
Borek
Mentor
28,822
3,340
Please elaborate on the meaning of your symbols.
 

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