3B Scientific Metal Block Calorimeters - Manual

3B SCIENTIFIC® PHYSICS
1
Set of 4 Metal Block Calorimeters U30070
Instruction Sheet
11/08 ALF
1 Steel calorimeter
2 Brass calorimeter
3 Copper calorimeter
4 Aluminium calorimeter
1. Safety instructions
There is a risk of burns from heater or calorimeter.
• Allow apparatus to cool before moving it.
2. Description
The set of 4 metal block calorimeters is used to
determine the specific heat capacity of aluminium,
brass, copper and steel.
The metal blocks are drilled with two holes to
accommodate an immersion heater (12.5 mm dia.)
and a thermometer or temperature probe (8 mm dia.).
3. Technical data
Mass of block: approx. 1 kg (±2% accuracy)
Material
Height
(mm)
Diameter
(mm)
Specific heat
J/(kg*K)
Aluminium 84 75 896
Brass 84 44 377
Copper 85 43 385
Steel 92 44 452
4. Additionally required equipment
1 DC Power Supply 0 - 20 V, 0 - 5 A (230 V, 50/60 Hz)
U33020-230
or
1 DC Power Supply 0 - 20 V, 0 - 5 A (115 V, 50/60 Hz)
U33020-115
1 Immersion Heater, 12 V U30075
1 Thermometer -20°C to +110°C U40911
1 Mechanical stopwatch, 30 min U40800
5. Operation
• Weigh the calorimeter block and record its mass.
• Place the calorimeter block on a heat proof mat
surrounded by insulation, so that the heat losses
are kept to the minimum.
• Insert the immersion heater and the thermometer
into the appropriate hole. Drop some oil or water
into the thermometer hole to ensure good
thermal contact between the thermometer and
the block.
• Set up the circuitry according fig. 1.
• Switch on the power supply and adjust it to give a
current of about 4 A. Switch the heater off.