Lab Get ready for the …. Examples of Heat Transfer by Conduction Define Conduction.

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Presentation transcript:

Lab Get ready for the …

Examples of Heat Transfer by Conduction Define Conduction

Examples of Heat Transfer by Conduction Definition of Conduction Heat transfer through direct contact by collisions between warmer and colder particles Hot chocolate causing cool spoon in cup to warm Hot aluminum cube warming cold water Burning your finger by letting the match flame touch it

Thermal Conductivity = A measure of how well a material conducts heat Conductor: material through which heat travels (= conducts) easily; high thermal conductivity Insulator: material through which heat travels (= conducts) poorly; low thermal conductivity In this experiment, we will measure…

Examples Good thermal (heat) Conductors Good thermal (heat) Insulators

Examples Good thermal Conductors Good thermal Insulators All metals – some better than others Solids better than liquids Styrofoam, most plastics Gases

Conductometer = wax “Hub”

Experiment Use conductometer TWICE –1st: Observe what happens Record observations Identify one observation to use to rank thermal conductivity –2nd: Carefully record your chosen observation for each spoke Use a COOL conductometer, not the same one Materials are: –Aluminum, Brass, Steel, Nickel or Iron, and Copper

Al Brass Steel Ni Cu Thick Handle Thin Handle Al = Aluminum Fe = Iron Ni = Nickel Cu = Copper

Your Melting Rate Results (1 = Fastest) Group Initials AlBrassSSNiCuFe