Calculate the change in entropy that occurs in the system when 1.24 mol of isopropyl alcohol (c3h8o) melts at its melting point (-89.5 ∘c). heat of fusion is 5.37 kj/mol.

The change in entropy that occurs in the system is 36.3 J/Kmol

Explanation:

Given : 1 mole of isopropyl alcohol gives heat = 5.37 kJ

Thus 1.24 moles of isopropyl alcohol gives heat =

To calculate the temperature , we use the equation:

where,  

= Entropy of fusion = ?

= enthalpy of fusion  = 6.66 kJ/mol = 6660 J/mol     (1kJ=1000J)

T = melting point =

Thus the change in entropy that occurs in the system is 36.3 J/Kmol

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