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# Heat Transfer Lab - PowerPoint PPT Presentation

Heat Transfer Lab. 8 th Grade Science Butler Middle School Lowell, MA. R. Rogers Mar 8, 2011. Thermal Energy Total Energy of all the moving molecules in an object Heat Thermal Energy moving from a warm object to a cooler object Heat transfers in 3 ways Conduction Convection Radiation.

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### Heat Transfer Lab

8th Grade ScienceButler Middle SchoolLowell, MA

R. RogersMar 8, 2011

• Thermal Energy

• Total Energy of all the moving molecules in an object

• Heat

• Thermal Energy moving from a warm object to a cooler object

• Heat transfers in 3 ways

• Conduction

• Convection

• Energy

• Ability to do work or cause change

• Exists in many different forms

• Kinetic Energy

• Energy from motion or movement

• Temperature

• A measure of the average Kinetic Energy of all the molecules in an object

• Measures Temperature

• Bulb Thermometer

• Based on expansion & contraction of a liquid in a glass tube

K C F

Water Boils

Water Boils

K & C degrees are same size

F deg are smaller than C deg

Ideal Room Temp, 68° F = 20° C

Water Freezes

Absolute Zero = Coldest Temp

Cold Water in Plastic Pail

Hot Water in Metal Can

Place a thermometer in

pail and in can. Wait for red

line to stop moving.

Record temperature of each,

call this:

“temperature at time 0”

Place metal can with hot water in plastic pail with cold water

Gently stir water in each container

Record temperatures of water in each container every 1 minute

Plot hot water temp and cold water temp vs time

90

80

Hot Water

70

60

Temperature

(Deg C)

50

40

30

Cold Water

20

10

0

1

2

3

4

5

6

Time (min)