Specific Heat


 
 
Concept Explanation
 

Specific Heat

Specific Heat:

The amount of heat required to raise a particular mass of a substance through a certain temperature depends on its specific heat capacity.The specific heat of a substance is the amount of heat that produces a unit temperature increase in the unit mass of that substance, that is, if the temperature of one gram mass of the substance is increased by 1 degree Celsius, the heat given in this process is called. The specific heat of the substance.

The specific heat capacity or specific heat of a substance is defined as the amount of heat required to raise the temperature of 1 kg of the substance through 1 °C.

Heat Capacity

Heat capacity is defined as the quantity of heat required to raise its temperature by 1°C.

Heat Capacity = Specific Heat X Mass

The calorie (cal) is the amount of heat required to raise the temperature of 1 g of water through 1°C

1 cal= 4.18 J

Quantity of heat (Q)= specific heat(s) X mass (m) X change in temperature (t).

Q= s x m x  t

Where mass is in kg , s is in J/kg °C and t is in °C, The quantity of heat  Q is in Joules (J)

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Sample Questions
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Question : 1

Heat capacity of a substance is equal to ___________________ .

Right Option : A
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Question : 2

Which of the following are correct ?

(a) Specific heat is defined as the amount of heat required to raise the temperature of 1 kg of the substance through 1 °C.

(b) Heat capacity is defined as the quantity of heat required to raise its temperature by 1°C.

Right Option : C
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Question : 3

What is the unit of specific heat capacity ?

 

Right Option : C
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