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Using equipartition of energy, the specific heat (in J kg-1 K-1) of aluminium at room temperature can be estimated to be (atomic weight of aluminium = 27)
25
410
925
1850
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As we learnt in
Kinetic energy of a gas due to translation per mole -
- wherein
R = Universal gas constant
T = temperature of gas
Using equipartition theorem.
Energy associated with each degree of freedom

For solid V = 3KT = mcT.
c = 925 J/kg-K
Correct option is 3.
Option 1)
25
This is an incorrect option.
Option 2)
410
This is an incorrect option.
Option 3)
925
This the correct option.
Option 4)
1850
This is an incorrect option.