Solid naphthalene is converted directly to gaseous naphthalene by first melting and…

CHEMISTRY · Subjective · A Level · Chemistry · Energetics · Energetics

Problem

Solid naphthalene is converted directly to gaseous naphthalene by first melting and then vaporizing. Given

\Delta H_{\text{fus}}=19\text{ kJ mol}^{-1}

and

\Delta H_{\text{vap}}=45\text{ kJ mol}^{-1}

, determine the quantity of energy transferred when

0.050\text{ mol}

of solid naphthalene undergoes this complete conversion and state whether the overall process is endothermic or exothermic.