The polymerization of ethylene to linear polyethene is represented by the reaction nCH2=CH2→--CH2-CH2--n where ‘n’ has large integral value. Given that average enthalpies of bond dissociation for C=C and C-C at 298K are +590 and +331KJ mol−1 respectively. Calculate the enthalpy of polymerization per mole of ethylene at 298K.

see full answer

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!

An Intiative by Sri Chaitanya

−36KJmol−1

−72KJmol−1

−18KJmol−1

−90KJmol−1

answer is B.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

ΔHpolymerisation =-2ΔC-cH+ΔC=cH=-2(331)+590=-662+590=-72KJmol-1

Watch 3-min video & get full concept clarity