Specific Heat Of Solids

The specific heat capacity of copper, glass and lead are determined by heating the material in a steam chamber and then transferring the heated material into a weighed amount of water in a dewar vessel and measuring the temperature.
In the present setup, the system consists of mixing a given mass m₁ of a hot metal specimen specific heat c₁ at temperature T₁ with a known mass m₂ of water of specific heat c₂ at a lower temperature T₂ contained in a calorimeter of mass m₃ of specific heat c₃ initially at temperature T₂ . Once again we assume the system to be thermally insulated from the surroundings, and the heat capacity of the thermometer, which records the temperature, can be neglected. Let the final temperature of the mixture be T_f . Energy conservation gives:
Q_lost (Metal) = Q_gained (Water) + Q_gained (Calorimeter)
m₁ c₁ (T₁ - T_f ) =m₂ c₂ (T_f -T₂ ) +m ₃ c ₃ (T _f -T ₂ )
which, yields the unknown specific heat c ₁ of the metal specimen as
c₁ = (m₂ c₂ +m₃ c₃ )( T_f -T₂ )/m₁ (T₁ -T_f )

Features:

• High insulation dewar flask with heat capacity of almost zero.
• Digital Weighing scales with maximum capacity of 700gm.
• PT-100 based digital thermometer with accuracy of 0.1 degree Celsius.
• Different samples Like Copper and Lead supplied with experiment.

Objectives:

• To determine the specific heat capacity of solids (Copper and lead).

Technical Data:

Digital timer & photogate:

• Digital thermometer : Pt-100, Range -50 to +199.9 C, Resolution 0.1 C, Accuracy ± 0.2 C ± 1 digit, Battery 9V
• Dewar Flask : 350ml portable, 100% rust free, vacuum insulated, designed for hot & cold, copper coating provides heat retention
• Samples : Copper & Lead, 100gm each
• Steam chamber : Inner chamber 100x30mm (LxΦ), Outer chamber 80x75mm (LxΦ), Nozzle 30 x 8mm (LxΦ), Handle L=90mm, PVC.

Scope of Delivery:

• 1 ‘’A’ shaped base
• 1 Three finger clamp
• 1 Dewar Flask
• 1 Bosshead
• 1 Rod (0-50cm)
• 1 Steam Chamber
• 1 Beaker
• 1 Copper sample (100gm)
• 1 Lead sample (100gm)
• 1 Rubber cork
• 1 Digital Thermometer
• 1 Digital weighing scale
• 1 Silicone Tubing,1.5m
• 1 Steam generator

Key Topics:

• Heat
• Specific heat capacity
• Conservation of energy
• Calorification
• Water equivalent