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When `1g` liquid naphthalene `(C_(10)H_(8))` solidifies, `149J` of heat is evolved. Calculate the enthalpy of fusion of naphthalene.

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When `1g` liquid naphthalene `(C_(10)H_(8))` solidifies, `149J` of heat is evolved. Calculate the enthalpy of fusion of naphthalene.
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Molecular weight of naphthalene
image
`1g` of naphthalene given heat `= 149 J`
`:. 128 g gives rArr 149 xx 128 rArr 19072 J`
`Delta_(f)H = + 19072 J`
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