1a: We eat food to gain energy. Some foods provide energy more
efficiently than others. The established energy value for three
food types is given: carbohydrates, 17 kJ/g; fats, 38 kJ/g; and
proteins, 17kJ/g. Look at the nutrition label on your favorite
candy bar. Calculate the energy gained by eating this candy.
1b: If the same amount of heat is added to equal masses of
aluminum, lead, zinc, and iron, which metal would experience the
greatest increase in temperature? Explain.