Advertisements
Advertisements
प्रश्न
What do you mean by the following statement?
The heat capacity of a body is 50 JK-1?
उत्तर
The heat capacity of a body is 50 Jk-1 means to increase the temperature of this body by 1K we have to supply 50 joules of energy.
APPEARS IN
संबंधित प्रश्न
Calculate the mass of ice required to lower the temperature of 300 g of water 40°C to water at 0°C.
(Specific latent heat of ice = 336 J/g, the Specific heat capacity of water = 4.2J/g°C)
What do you mean by the following statement?
The specific heat capacity of copper is 0. 4 Jg-1 K-1?
Explain the term boiling ?
How will global warming disturb the ecological balance?
Which principle is used to measure the specific heat capacity of a substance?
Define heat capacity and state its units.
Read the passage and answer the questions based on it.
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 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 then no energy can flow from inside the box or come into the box. In this situation, we get the following principle.
Heat energy lost by the hot object = Heat energy gained by the cold object. This is called the ‘Principle of heat exchange’.
- Where does heat transfer take place?
- In such a situation which principle of heat do you perceive?
- How can this principle be explained in short?
- Which property of the substance is measured using this principle?
What is specific heat capacity?
Numerical Problem.
How much heat energy is required to change 2 kg of ice at 0°C into water at 20°C? (Specific latent heat of fusion of water = 3,34,000 J/kg, Specific heat capacity of water = 4200 JKg–1K–1).
