At what temperature is the formation of products more favorable than reactants f

Question

At what temperature is the formation of products more favorable than reactants for the below reaction? In polymer chemistry, there is a term known as the Ceiling Temperature. T_c, which corresponds to the temperature at which polymer reverts back to monomer faster than monomer converts to polymer. The ceiling temperature of polystyrene (styrofoam) is 395 degreeC. If the standard enthalpy of polymerization for polystyrene is Delta H degree = -70.67 kJ/mol. what is the standard entropy of polymerization?

Explanation / Answer

1) when delta G < 0 , the formation of products is more favourable.

Now, delta G = delta H - T*delta S

or, delta H - T*delta S < 0

or, delta H < T*delta S

or, T > delta H/delta S

2) delta S0 = delta H0/T = -70670/(395+273) = -105.79 J/K

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