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The bond energies of C=C and C-C at 298 ...

The bond energies of `C=C` and `C-C` at `298 K` are `590` and `331 kJ mol^(-1)`, respectively. The enthalpy of polymerisation per mole of ethaylene is

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Polymerisation of ethylene to linear polythylene is
`n(CH_(2) = CH_(2)) rarr (CH_(2) -CH_(2))_(n)`
Energy released = Energy due to formation of two single bonds
` =2 xx 331 = 662 kJ "mole"^(-1)` of ethylene.
`DeltaH_("polymerisation") = 590 - 662`
`=- 72 kJ mol^(-1)`
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CENGAGE CHEMISTRY ENGLISH-THERMODYNAMICS-Exercises (Subjective)
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