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Question
Differentiate between heat capacity and specific heat capacity.
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Solution 1
Heat capacity of the body is the amount of heat required to raise the temperature of (whole) body
by 1 ℃ whereas specific heat capacity is the amount of heat required to raise the temperature of
unit mass of the body by 1 ℃.
Heat capacity of a substance depends upon the material and mass of the body. Specific heat
capacity of a substance does not depend on the mass of the body.
S.I. unit of heat capacity is `JK^-1` and S.I. unit of specific heat capacity is `Jkg^-1 K^-1`.
Solution 2
Heat capacity: It is the amount of heat energy required to raise the temperature by 1°C. Specific heat capacity: It is defined as the heat capacity per unit mass of that body.
RELATED QUESTIONS
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(Specific latent heat of ice = 336 J/g, the Specific heat capacity of water = 4.2J/g°C)
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Read the following paragraph and answer the questions.
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If heat is exchanged between a hot and cold object, the temperature of the cold object goes on increasing due to gain of energy and the temperature of the hot object goes on decreasing due to loss of energy. The change in temperature continues till the temperatures of both the objects attain the same value. In this process, the cold object gains heat energy and the hot object loses heat energy. If the system of both the objects is isolated from the environment by keeping it inside a heat resistant box (meaning that the energy exchange takes place between the two objects only), then no energy can flow from inside the box or come into the box. |
- Heat is transferred from where to where?
- Which principle do we learn about from this process?
- How will you state the principle briefly?
- Which property of the substance is measured using this principle?
Calculate the amount of heat released when 5.0 g of water at 20°C is changed into ice at 0°C.
(Specific heat capacity of water = 4.2 J/g°C
Specific latent heat of fusion of ice = 336 J/g)
The molar specific heat of a gas at constant volume is 12307.69 J kg-1 K-1. If the ratio of the two specific heats is 1.65, calculate the difference between the two molar specific heats of gas.
The cold object the hot object enclosed in one box of heat-resistant material.
- What changes will occur in the two objects when temperature flows from those objects?
- Which principle can show that the energy exchange takes place between two objects only when kept in isolated system?
_______ is defined as the amount of heat required to raise the temperature of 1kg of a substance by 1°C.
Two metals A and B have specific heat capacities in the ratio 2 : 3. If they are supplied the same amount of heat then
Which metal piece will show a greater rise in temperature given their masses is the same?
Two cylinders of equal height and radius are made of copper and aluminum. Which of them conducts heat faster?
