This is a very simple experiment designed to show heat conduction. There are two assumptions made when this experiment was done. First, it was assumed that the heat source conditions are known and that all of the heat generated flows through one end of the rod to generate a steady-state process. Second, it is assumed that enough heat is generated by the heat source in the specified time frame to melt the wax or cause the candles to drop.

1. Conduction
EXPERIMENT ON HEAT TRANSFER

2. Objectives
 To be able to understand the premise of conduction, its concepts
and theories
 To show how heat transfer happens in conduction using the
different materials
 To be able to compare conduction with other forms of heat transfer
like convection and radiation

3. Theory


4. CONDUCTION FORMS
THE SIMPLE ACT OF FRYING IN A PAN IS ALREADY A FORM
OF CONDUCTON HEAT TRANSFER

5. How The Laboratory Set-up Would Look Like
An experiment which demonstrates different metals have different conductivity

7. Materials
Four rods different materials (copper, brass, iron, aluminum.) We have to make sure that
the rods have the same diameter.
Several rods of the same material but of different diameters
Box of colored birthday candles
Ring stand (or block of wood or brick for resting the heated rods)
Hot plate with known Voltage and Current Conditions
Metric ruler
Watch or clock with
Graph paper

8. Procedure
• Label each rod (A, B, and C, D)
• Using a metric ruler, mark off one-centimeter increments on the rods.
• Using graph paper, make a data table with an entry for each rod.
• Turn on the hot plate. We’re looking for ways to make sure that the heat will be
isolated towards the rod.
• Put the candles on the marks on the rods.
• Place one end of one of the rods on the edge of the hotplate, balancing the other
end on the wood block

9. • Time how long it takes for the heat to travel down the rod, recording the time when it
melts the drops of wax.
• Repeat with each of the other rods.
• Make a graph with time versus distance to record the information from the data table.
• Make a list indicating which rod was the best conductor and which rod was the poorest
conductor.
• Calculate for K.

10. METHOD:
Since we will be having 4 rods of different materials in this experiment. We will do the
set-up two at a time so we can have a better comparison of the data.
Two rods of the same size, one made of aluminum and one of brass, are heated by the
same lighter at one end. Candles are stick evenly along both rods. Starting from the
heated end, these candles would fall one by one as the heat conducted through the
rods is sufficient to melt the base of the candles. An earlier time of fall thus indicates that
the metal is a better conductor of heat.
The next 2 other metals will be made of copper and iron.
DISCLAIMER: We are comparing metals because comparison of conductivity is already
apparent in metals vs wood, or metals vs plastic.

11. ECONOMICS
Four rods different materials - Buy each , estimate at P60.00 each * 4 = P240.00
Box of colored birthday candles – P50.00
Ring stand – available in the lab
Hot plate with known Voltage and Current Conditions - Lab or nothing
Metric ruler – Lab or we provide
Watch or clock with – Individual
Graph paper – P10.00
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TOTAL = P300.00