
Heat capacity: It is the amount of heat energy required to raise the temperature of a body by 1 ^{o}C.
C = E / Δθ
Δθ represents the difference in temperature (θ_{2} – θ_{1}).
Unit: J/^{o}C.


Specific heat capacity: It is the amount of heat energy required to raise the temperature of 1 kg of a substance by 1 ^{o}C.
c = E / (m Δθ)

Unit: J/(kg ^{o}C)


Specific heat capacity of different materials is different.

For example, 1 kg of copper needs far less energy than 1 kg of water for a temperature rise of 1^{o}C .


Experiment to determine the specific heat capacity of a liquid:

Use the formula: c = E / (m Δθ)

Therefore,

Calculate the electrical energy that changes into heat.

Measure the mass of liquid.

Note the initial and final temperatures.


Precautions

Use lagging for heat insulation.

Stir liquid for uniform distribution of heat.

After switching off the heater, allow mercury thread to rise and consider the maximum value to be the final reading.


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