Entropy Video Lessons

Concept

# Problem: Calculate the change in entropy that occurs in the system when 45.0 g of acetone (C3H6O) freezes at its melting point (-94.8 ˚C). ΔHfus = 5.69 kJ/mol.

###### FREE Expert Solution

We can use the formula below to determine the entropy change(ΔS):

$\overline{){\mathbf{∆}}{\mathbf{S}}{\mathbf{=}}\frac{\mathbf{∆}{\mathbf{H}}_{\mathbf{fus}}}{\mathbf{T}}}$

where ΔHfus is the heat of fusion

T is the temperature in Kelvin (K)

Recall:

1 kJ = 103 J

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###### Problem Details

Calculate the change in entropy that occurs in the system when 45.0 g of acetone (C3H6O) freezes at its melting point (-94.8 ˚C). ΔHfus = 5.69 kJ/mol.