Instruction Sheet - 3B SCIENTIFIC U30070 Instrucciones De Uso

1003253 / Set of 4 Metal Block Calorimeters U30070

Instruction Sheet

11/08 ALF
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:
Height
Material
(mm)
Aluminium 84
Brass 84
Copper 85
Steel 92
approx. 1 kg (±2% accuracy)
Diameter Specific heat
(mm) J/(kg*K)
75 896
44 377
43 385
44 452
4. Additionally required equipment
1 DC Power Supply 0 - 20 V, 0 - 5 A (230 V, 50/60 Hz)
or
1 DC Power Supply 0 - 20 V, 0 - 5 A (115 V, 50/60 Hz)
1 Immersion Heater, 12 V
1 Thermometer -20°C to +110°C
1 Mechanical stopwatch, 30 min

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
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.
1
1 Steel calorimeter
2 Brass calorimeter
3 Copper calorimeter
4 Aluminium calorimeter
U33020-230
U33020-115
U30075
U40911
U40800
5. Operation
immersion heater and the