How Much Enthalpy Is Necessary to Heat 10 $\circ$ C to Benzene Vapor at 100

question 14

Multiple Choice

How much enthalpy is necessary to heat 10.0 g of solid benzene (C₆H₆) at 0.0 ^$\circ$ C to benzene vapor at 100 ^$\circ$ C $~~~~~~~~~~~~~~~~~~~~~\text { Data for Benzene }$
$\begin{array}{|l|l|}\hline \text { melting point } & 5.5^{\circ} \mathrm{C} \\\hline \text { boiling point } & 80.1^{\circ} \mathrm{C} \\\hline \text { specific heat of solid benzene } & 1.52 \mathrm{~J} / \mathrm{g} \cdot{ }^{\circ} \mathrm{C} \\\hline \text { specific heat of liquid benzene } & 1.73 \mathrm{~J} / \mathrm{g} \cdot{ }^{\circ} \mathrm{C} \\\hline \text { specific heat of benzene vapor } & 1.06 \mathrm{~J} / \mathrm{g} \cdot{ }^{\circ} \mathrm{C} \\\hline \Delta \mathrm{H}_{\text {fus }} & 9.9 \mathrm{~kJ} / \mathrm{mol} \\\hline \Delta \mathrm{H}_{\text {vap }} & 30.8 \mathrm{~kJ} / \mathrm{mol} \\\hline\end{array}$

• A) 6.8 kJ
• B) 6.0 kJ
• C) 5.2 kJ
• D) 4.4 kJ
• E) None of the above

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