Using energy values from TABLE 3.8, determine each of the following:

c. If Charles consumes 1800 kcal per day, he will maintain his weight. Would he lose weight on his new diet?

Using energy values from TABLE 3.8, determine each of the following:

d. If expending 3500 kcal is equal to a loss of 1.0 lb, how many days will it take Charles to lose 5.0 lb?

For the amount of exercise that Charles did for one week in part a, if expending 3500 kcal is equal to a loss of 1.0 lb, how many pounds did he lose?

After a week, biochemical reactions in compost slow, and the temperature drops to 45 °C. The dark brown organic-rich mixture is ready for use in the garden. What is this temperature in degrees Fahrenheit? In kelvins? (3.3)

Calculate the energy to heat two cubes (gold and aluminum) each with a volume of 10 cm³ from 15 °C to 25 °C. Refer to Tables 2.8 and 3.11.

A 70.0-kg person had a quarter-pound cheeseburger, french fries, and a chocolate shake.

<IMAGE>

d. Using TABLE 3.10, determine the number of hours of running needed to burn off the kilocalories in this meal.

Classify each of the following as an element, a compound, or a mixture:

b. a salad dressing of oil and vinegar

Classify each of the following mixtures as homogeneous or heterogeneous:

b. herbal tea

Classify each of the following mixtures as homogeneous or heterogeneous:

c. vegetable oil

Identify each of the following as a physical or chemical property:

c. Gold is a good conductor of electricity.

Identify each of the following as a physical or chemical change:

a. Aspirin tablets are broken in half.

Calculate each of the following temperatures in kelvins and degrees Fahrenheit:

a. The highest recorded temperature in the world was 58.0 °C in El Azizia, Libya, on September 13, 1922.

Calculate each of the following temperatures in kelvins and degrees Fahrenheit:

b. The lowest recorded temperature in the world was –89.2 °C in Vostok, Antarctica, on July 21, 1983.

What is –15 °F in degrees Celsius and in kelvins?

On a hot day, the beach sand gets hot but the water stays cool. Would you predict that the specific heat of sand is higher or lower than that of water? Explain.

<IMAGE>

The following graph is a heating curve for chloroform, a solvent for fats, oils, and waxes:

d. At the following temperatures, is chloroform a solid, liquid, or gas?

–80 °C, –40 °C; 25 °C; 80 °C

A hot-water bottle for a patient contains 725 g of water at 65 °C. If the water cools to body temperature (37 °C), how many kilojoules of heat could be transferred to sore muscles?

When a 0.66-g sample of olive oil is burned in a calorimeter, the heat released increases the temperature of 370 g of water from 22.7 °C to 38.8 °C. What is the energy value for the olive oil in kcal/g?

A 45-g piece of ice at 0.0 °C is added to a sample of water at 8.0 °C. All of the ice melts and the temperature of the water decreases to 0.0 °C. How many grams of water were in the sample?

In a large building, oil is used in a steam boiler heating system. The combustion of 1.0 lb of oil provides 2.4 × 10⁷ J.

a. How many kilograms of oil are needed to heat 150 kg of water from 22 °C to 100 °C?

In a large building, oil is used in a steam boiler heating system. The combustion of 1.0 lb of oil provides 2.4 × 10⁷ J.

b. How many kilograms of oil are needed to change 150 kg of water to steam at 100 °C?

When 1.0 g of gasoline burns, it releases 11 kcal. The density of gasoline is 0.74 g/mL.

b. If a television requires 150 kJ/h to run, how many hours can the television run on the energy provided by 1.0 gal of gasoline?

A metal is thought to be titanium or aluminum. When 4.7 g of the metal absorbs 11 J, its temperature rises by 4.5 °C.

b. Would you identify the metal as titanium or aluminum (see TABLE 3.11)?

A metal is thought to be copper or gold. When 18 g of the metal absorbs 58 cal, its temperature rises by 35 °C.

a. What is the specific heat, in cal/g °C, of the metal?