2. Energy exits in two basic forms, ____________________ and ____________________ energy.

3. The ____________________ is defined as the system along with the surroundings.

4. A __________ is an insulated device used for measuring the amount of heat absorbed or released during a chemical or physical process.

5. The energy stored in a substance due to its composition is called ____________________ potential energy.

6. The _______________ of any substance is the amount of heat required to raise the temperature of one gram of that substance by one degree Celsius.

7. When the change in enthalpy is negative the reaction is _______________.

8. When the change in enthalpy is positive the reaction is _______________.

9. The SI unit of heat and energy is the __________.

10. The amount of energy required to raise the temperature of one gram of pure water by one degree Celsius is defined as a _______________.

11. Rice contains 245 nutritional Calories. Calculate the energy in joules.

12. 53 grams of a mystery powder was heated from 46°C to 62°C. The powder absorbed 3,285 J of energy. What is the specific heat of the powder?

13. Calculate the heat (in calories) released by ethanol being burned. The ethanol contains 356 joules of energy.

14. When 75 grams of a metal is heated from 25°C to 42°C, it absorbs 6,280 J of energy. What is the specific heat of the metal?

15. My lunch contains 550 nutritional Calories. Express this energy in joules.

16. How much heat is absorbed by 12.2 g of water when its temperature is increased from 32°C to 65°C? The specific heat of water is 4.184 J/(g°C).

17. Calculate the heat gained by 532 g of water when it is put into a calorimeter and its temperature is increased by 125°C. The specific heat of water is 0.4184 J/(g°C).

18. An unknown metal with a mass of 82.3 g is heated to a temperature of 95 0C. It is then placed in 62 g of water that is at a temperature of 22 0C. The temperature of the water and metal then rises to 26.2 0C. What is the specific heat of the metal?

19. 14.2 g of an unknown metal, with a specific heat of 2.34 J/g 0C, is heated to 102 0C. It is then placed into a calorimeter that has 63.4 g of water. If the water and the metal then reach a temperature of 18.6 0C, what was the initial temperature of the water in the calorimeter?