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JEE Main Chemistry question

ChemistryThermodynamicsJEE Main

The polymerization of propene to linear polypropylene is represented by the reaction n\left(\begin{smallmatrix}CH_3\\|\\CH=CH_2\end{smallmatrix}\right) \rightarrow \left(\begin{smallmatrix}CH_3\\|\\CH-CH_2\end{smallmatrix}\right)_n, where has a large integral value. The average enthalpies of bond dissociation for (C=C) and (C-C) at 298 K are and respectively. The enthalpy of polymerization is . Find the value of .

Answer: 5

Solution

In each monomer unit, one C=C bond is broken (absorbing 590 kJ/mol) and two new C-C single bonds are formed, one to each neighbouring unit (releasing

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Question ID VK-134997