91Ó°ÊÓ

Identify each of the following as a physical or chemical change: $(3,2)$

a. Aspirin tablets are broken in half.

b. Carrots are grated for use in a salad.

c. Mall undergoes fermentation to make beer.

d. A copper pipe reacts with air and turns green.

Calculate each of the following temperatures in degrees Celsius and kelvins: (3.3)

a. The highest recorded temperature in the continental United States was $134°\mathrm{F}$in Death Valley, California, on July 10, $1913$

b. The lowest recorded temperature in the continental United States was $-69.7°\mathrm{F}$in Rodgers Pass, Montana, on January $20,1954$

Calculate each of the following temperatures in kelvins and degrees Fahrenheit: $(3.3)$

a. The highest recorded temperature in the world was $58.0{}^{∘}\mathrm{C}$in El Azizia, Libya, on September 13, 1922.

b. The lowest recorded temperature in the world was$-89.2{}^{∘}\mathrm{C}$in Vostok, Antarctica, on July 21, 1983.

What is $-15°\mathrm{F}$ in degrees Celsius and in keivins? $(3.3)$

What is $−{15}^{∘}\mathrm{F}$ in degrees Celsius and in kelvins?

What is ${56}^{∘}F$in degrees Celsius and in kelvins?

What is ${56}^{∘}\mathrm{F}$in degrees Celsius and in kelvins?

A 0.50-g sample of vegetable off is placed in a calorimeter. When the sample is burned, $18.9\mathrm{kJ}$is given off. What is 4 energy value (kcal/g) for the oil? (3.5)

A 0.50-g sample of vegetable oil is placed in a calorimeter. When the sample is burned, 18.9 KJ is given off. What is the energy value (kcal/g) for the oil?

A $1.3−\mathrm{g}$sample of rice is placed in a calorimeter. When the sample is burned, $22\mathrm{kJ}$is given off. What is the energy value $(\mathrm{kcal}/\mathrm{g})$ for the rice?