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Question : A Glass-bottle is formed at 690 C(at softening point) with a viscosity = 10^7...

Question : A Glass-bottle is formed at 690 C(at softening point) with a viscosity = 10^7 P. If the activation energy for viscous deformation is 490 kJ/mol, calculate the annealing temperature with a viscosity = 10^13 P. Note k=8.314 J/mol k

Expert Solution

From Arrhenius Equation:

.......EQ1

where, are the viscosities at temperature and the reference viscosity respectively,

with and

So for annealing temperature, , viscosity will be given by EQ1, as

........EQ2

Similarly, for temperature, , viscosity will be given by EQ1, as

........EQ3

Dividing EQ2 by EQ3 we get,

Substituting values we get,

genius_generous answered 2 years ago

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