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Temperature and Heat

  1. May 9, 2006 #1
    A .1 kg piece of aluminum at 90 degrees C is submerged in 1 KG of water at 10 degrees C. What is the temperature when they reach equalibrium?

    Now I know, aluminum has a c of 920 J/(kg * degree C) and water has a c of 4186 J/(kg * degree C).

    I'm not sure how to approach this.

    Best I can think of is setting m*c*dT for the water equal to m*c*dT for the aluminum. But I have two unknown variables there. (The dT's) So that can't be right. Help is appreciated.
  2. jcsd
  3. May 9, 2006 #2


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    What is the definition for your delta T? It is [tex]\Delta T = T_{end} - T_{start}[/tex]

    Does that point you in the right direction? Also, think about the physical situation when the two have reached equillibrium...
  4. May 9, 2006 #3

    Andrew Mason

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    This means you will need to work out two equations to determine the values of these two different delta T's.

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