Extra Credit assignment

10 points.

How does a refrigerator (or air conditioner) work?

-Write a well-developed paragraph that clearly explains how the following key concepts from chapter 5 play a role in refrigeration. This marvelous technological advance of the early 1900's has improved people's quality of living all over the world.

KEY CONCEPTS:

• latent heat (including heat of vaporization)
  
• phase changes
• Charles Law
• heat flow

All of these come together in what is called the "refrigeration cycle" in your refrigerator. Questions to consider: If cold air exists inside the fridge and cold is the absence of heat, where does the heat go? Where does the heat from the food end up?
If you were to leave the refrigerator door open for a few hours on a hot summer day, could you cool your kitchen?
Would it be correct to say, in thermodynamic terms, that a refrigerator or air conditioner "moves heat"?

Including a diagram (your OWN diagram, not from the internet) will fetch you an additional 5 points if it explains the refrigeration cycle correctly.

DUE ON OR BEFORE FEBRUARY 20.