The enthalpy of fusion for benzene (c6h6, 78.0 g/mol) is 127.40 kj/kg, and its melting point is 5.5°c. what is the entropy change when 1 mole of benzene melts at 5.5°c? (show all unit conversions and write out all equations)

35.662 J/K is the entropy change when 1 mole of benzene melts at 5.5°C

Explanation:

The enthalpy of fusion for benzene =

Molar mass of benzene = 78.0 g/mol

Or can be written as 1 mole of benzene = 78.0 g

1 g of benzene  =

= 127.40 kJ/kg=127.40 kJ/1000 g (1kg = 1000 g)

= 9.9372 kJ/mol = 9937.2 J /mol

The entropy change when 1 mole of benzene melts at 5.5°C:

T = 5.5°C = 278.65 K

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