Name: _____________________________________________ Period: _____ Date: _________

Dekalb Reads Assignment 10.3 B

Using Heat

Read pages 342-345 and answer the following questions
  1. What happens to the usable energy when it is transferred?
  2. What happens to some of the energy used to increase the temperature of water in a hot water tank?

    3.  

  3. The amount of useable energy decreases in ________________________.
  4. Due to ________________ and ______________ some energy is lost to the tanks surroundings.
  5. *List at least 4 ways in which the heat energy is distributed when water is heated in the hot water tank.

    6.  

  6. Name the insulating material used in most buildings.
  7. Insulation minimizes __________________________________.
  8. Can insulation eliminate unwanted energy transfer?
  9. What is R-Value?
  10. What does greater R-value of a material indicate?
  11. Define cooling system.
  12. *If you place your hand near the rear of a refrigerator you will feel warm air being discharged. Why?

    13.  

  13. What flows in the coiled pipe of a refrigerator?
  14. Define refrigerant.
  15. What happens to the refrigerant during each operating cycle?
  16. Evaporation produces ______________________________.
  17. *Name a good refrigerant.
  18. ________________ transfers energy to the surroundings.
  19. Refrigerant becomes gas by ________________________.
  20. ________________________ is used to condense the refrigerant back in to liquid.
  21. What is a heat pump?

 

 

 
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