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The Heat of Fusion for Lead At 327C327^{\circ} \mathrm{C} Is 22.9 kJ/kg22.9 \mathrm{~kJ} / \mathrm{kg}

Question 21

Multiple Choice

The heat of fusion for lead at 327C327^{\circ} \mathrm{C} is 22.9 kJ/kg22.9 \mathrm{~kJ} / \mathrm{kg} and the specific heat of solid lead is 0.130 kJ/kgC0.130 \mathrm{~kJ} / \mathrm{kg}{ }^{\circ} \mathrm{C} , the specific heat of liquid lead is 0.0900 kJ/kgC0.0900 \mathrm{~kJ} / \mathrm{kg}{ }^{\circ} \mathrm{C} , and the heat of vaporization of lead at 1,620C1,620^{\circ} \mathrm{C} is 871 kJ/kg871 \mathrm{~kJ} / \mathrm{kg} . What is the energy needed to vaporize 100 grams of lead starting at 0C0^{\circ} \mathrm{C} ?


A) 156 kJ156 \mathrm{~kJ}
B) 189 kJ189 \mathrm{~kJ}
C) 105 kJ105 \mathrm{~kJ}
D) 147 kJ147 \mathrm{~kJ}
E) 176 kJ176 \mathrm{~kJ}

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