Chapter 5 Thermal Energy Problems (Math)

Estimate the change in the thermal energy of water in a pond with a mass of 1,000 kg and a specific heat of 4,200 J/(kg°C) if the water cools by 1°C. ______

-4,200,000 J

Approximately how much does the temperature of 33.0 g of graphite change when it absorbs 350 J of thermal energy? ______°C

15

The temperature of a 2.0-kg block increases by 5°C when 2,000 J of thermal energy are added to the block. What is the specific heat of the block? ______ J/(kg°C)

200

Calculate the specific heat of a metal if 0.3 kg of the metal absorb 9,000 J of heat as the metal warms by 10°C. ______ J/(kg°C)

3,000

A wooden block has a mass of 20.0 kg and a specific heat of 1,700 J/(kg×°C). Find the change in thermal energy of the block as it warms from 15.0 C to 25.0 C. ______

340,000 J

A wooden block has a mass of 0.200 kg, a specific heat of 710 J/(kg°C), and is at a temperature of 20.0°C. What is the block's final temperature if its thermal energy increases by 2,130 J? ______°C

35

The temperature of a 3.0-kg material increases by 5.0°C when 6,750 J of thermal energy are added to it. What is the specific heat of the material? ______ J/(kg°C)

450

200 g of water in a glass is at 10.0°C when an ice cube is placed in the glass. What is the temperature of the water after it has transferred 4,200 J of thermal energy to the ice cube? ______°C

5

The air in a room has a mass of 50 kg and a specific heat of 1,000 J/(kg°C). What is the Change in thermal energy of the air when it warms from 20°C to 30°C? _

500,000 J

How much thermal energy is needed to raise the temperature of 4.0 kg of water from 25°C to 75°C? ______

840,000 J