heat.txt

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Author:
jpowell22
ID:
112663
Filename:
heat.txt
Updated:
2011-10-27 16:30:42
Tags:
maureen
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Description:
lecture 9 and 10 10-25/27-11
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  1. What is thermodynamics?
    heat transfer
  2. All molecules of a substance move; when they move heat is produced due to what?
    friction

    • mechanical - friction
    • chemical - metabolism
    • electricity - friction/resistance
  3. What is the 1st law of thermodynamics?
    conservation of energy (capacity to do work)

    energy cannot be created or destroyed
  4. What is the 2nd law of thermodynamics?
    heat ALWAYS flows from hot objects to cold objects

    hot pack to tissues

    ankle inflammation to cold pack
  5. What are the 4 methods of heat transfer?
    • conduction
    • convection
    • radiation
    • conversion
  6. What is conduction?
    transmitted between 2 objects in direct contact with each other

    HP, CP, paraffin wax
  7. What is the movement of a mass, gas, or liquid (medium has 2 different temps of body tissue your treating)?
    convection

    whirlpool, fluidotherapy
  8. What is radiation?
    from hot objects to area without a median getting heating

    hot object to cold objects without touching and medium doesnt get heated

    infrared
  9. Heat developed in tissue by passage through tissue of electrical current
    (converting 1 type of energy into heat), is known as what?
    conversion

    • ultrasound (sound waves to heat)
    • diathermy
  10. What is the quantity of heat that will raise the temp of 1gram of a substance by 1degree c?
    specific heat
  11. What both at the same temp, materials at a high specific heat hold more what what materials at low specific heat?
    more energy
  12. Tissues at what specific heat require more energy to achieve the same temp increase than tissues with a what specific heat?
    higher, lower
  13. What is the specific heat and temp of paraffin wax?
    .45; 122degrees
  14. What is the specific heat and highest temp used of water?
    1; 104degrees
  15. What is thermal conductivity?
    heat transfers from 1 place to another by a conductor
  16. Good thermal conductors have what type of heat value?
    higher
  17. Poor thermal conductors are considered what?
    insulators
  18. Tile is colder, this makes it a better what?
    conductor
  19. Carpet is warmer, this makes it a better what?
    insulator
  20. What are 4 ways heat can be loss?
    • 1. radiation (heat radiates off object)
    • 2. conduction(heat loss by direct contact)
    • 3. convection (heat through a medium)
    • 4. evaporation (sweat)
  21. What are 4 ways heat can be loss through the body?
    • 1. through skin
    • 2. respiration
    • 3. urine
    • 4. feces
  22. Amounts of heat loss has to do with various factors such as?
    • humidity
    • temperature
    • air movement (increased air movement - greater loss of heat) fans
  23. What are some factors that heat is dependant on?
    • 1. source of heat
    • 2. type of heat
    • 3. frequency of treatment
    • 4. size of area
    • 5. age of patient
    • 6. duaration of treatment
    • 7. temperature difference
    • 8. amount of penetration
  24. A hot pack is what type of heat transfer?
    conduction
  25. What type of heat transfer is paraffin wax?
    conduction
  26. A cold pack is what type of heat transfer?
    conduction
  27. Ultrasound is what type of heat transfer?
    conversion
  28. What type of heat transfer is diathermy?
    conversion
  29. Whirlpool is what 2 types of heat transfer?
    convection, conduction
  30. Infrared is what 2 types of heat transfer?
    radiation, conversion
  31. What type of heat transfer is fluidotherapy?
    convection

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