Physics > Heat > Calorimetry

Good quality one piece spinning, rolled rim, polished finish vessel with wooden/bakelite lid fitted with rubber stopper and metal stirrer.

(Ht x Dia) (Ht x Dia)

A. Copper 75 x 50 mm B. Copper 100 x 75 mm

C. Aluminium 75 x 50 mm D. Aluminium 100 x 75 mm

Complete set consisting of 75 x 50 mm, (Ht x dia) copper vessel resting on felt pad inside on outer copper vessel 100 x 75 mm (Ht x dia). Outer vessel fitted with boss detachable clip for holding, thermometer, complete with stirrer, lid, without thermometer

To determine specific heat of a liquid by electrical method. It comprises a copper vessel 75 x 50 mm fitted with a cork and a heating coil of thin constantan wire. Terminal connectors for electrical connection. Supplied without thermometer.

It is alternate Model used to determine specific heat of a liquid by electrical method. Comprises a copper vessel 75 x 50mm (Ht x diameter) enclosed within an outer vessel of aluminium. A close fitting ebonite lid with rubber cork with hole for thermometer is provided with a wire stirrer and a pair of terminals connected to constantan wire heating coil. The resistance of coil 6.0 ohms and current 0.5 - 1A. Supplied without thermometer.

Usable for experiments on specific heat capacity of different metals. Cylindrical blocks with 12.5mm central hole to accept immersion heater and hole for thermometer. Mass of each, 1 kg ± 2%

Aluminium Alloy : 76x84 (dia x height) mm Approx.

Brass : 44x84 (dia x height) mm Approx.

Copper : 44x79 (dia x height) mm Approx.

Steel : 44x89 (dia x height) mm Approx.

Supplied without thermometer.

Equal in mass, comprises six metal cylinders ofmass 100 gm each of Al, brass, copper, iron, lead and zinc.

Equal in size. It consists of six cylinders each of size 38 x 9.5 mm. One each Copper, Lead, Brass, Iron, Zinc and Aluminium.

To determine electrical equivalent of heat. Vacuum jacketed glass tube with constricting jet for insertion in outlet-end of flow tube to ensure turbulence. Overall length of tube 360 mm approx. Fitted with coiled heating element, resistance 2 ohms, 18 W, wound on removable glass former. Inlet and outlet tubes for water supply and two rubber stoppers to take thermometers (-50°C to 50°C). On wooden base, for connections to d.c. supply upto 6V, 3A Supplied without thermometers and power supply.

It is used to determine the absolute heat of combustion of foods (calorific values). It may also used to find out relative values of heat of combustion of a series of foods by comparing the rise of temperature of a fixed volume of water when a constant mass of a substance is burnt completely.

Apparatus Comprises of two assemblies;

a) Calorimeter Unit b) Base Unit

The Calorimeter unit carries heat exchanger unit and base unit has crucible holder, ignition system etc. etc.

a) Calorimeter Unit

Comprises of a glass water jacket 150 x 80 mm (Ht x dia) surrounding a combustion chamber integral with it and open at its base. This combustion chamber is connected to a copper spiral heat transfer tube. The upper end of this tube passes through a hole in the lid on top and when in use is connected to a filter pump to draw the products of combustion through the copper spiral. A wire stirrer also passes through the cover and a hole with a bored rubber stopper is provided to accommodate a thermometer. Supplied complete with thermometer -5 to + 50°C x 0.10C (Mercury in glass)

b) Base Unit

Metal disc about 100 mm dia with a boss for mounting on 12mm retort rod (without rod). The unit works as the base of the combustion chamber and has inlet tubule 6 mm diameter for oxygen supply (oxygen supply is necessary to completely burn the food) and pair of pillars carrying low voltage igniter coil. Also having a moveable crucible support to enable the crucible to raise to the level of igniter coil from outside the assembled apparatus. Supplied without retort stand, crucible or spirit lamp.

Spare and Accessories

Spare borosilicate glass calorimeter jacket (150 x 80mm, L x Dia) P-2400/1

Spare igniter coil pack of 5 Pcs. P-2400/2

Nickel Crucible, one Pc. P-2400/3

Retort stand & base : Tripod 'A' base with rod P-2400/4

Spirit lamp for volatile samples P-2400/5

Low Voltage Supply Unit 12 V : Pl. see Power Supply Section. Oxygen Gas supply with regulator : To be obtained locally.