The enthalpy of fusion of naphthalene is

CHEMISTRY · Single correct · AP · Chemistry · Thermochemistry · Thermochemistry

Problem

19.0\,\text{kJ mol}^{-1}

, and its enthalpy of vaporization at its boiling point is

45.0\,\text{kJ mol}^{-1}

. Calculate the total energy, in kJ, required to (a) melt and (b) vaporize 2.00 mol of naphthalene at its phase-transition temperatures at 1 atm. Which pair most closely represents these energies? (a)

64\,\text{kJ}

for melting;

64\,\text{kJ}

for vaporizing (b)

38\,\text{kJ}

for melting;

90\,\text{kJ}

for vaporizing (c)

38\,\text{kJ}

for melting;

45\,\text{kJ}

for vaporizing (d)

90\,\text{kJ}

for melting;

38\,\text{kJ}

for vaporizing

Related theory

Thermodynamics

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