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प्रश्न
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?
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उत्तर
- Heat is transferred from the object at higher temperature to the object at lower temperature.
- We learn the principle of heat exchange from this process.
- Principle of heat exchange states that the heat energy lost by hot object is always equal to heat gained by cold object provided that the system of both the objects is isolated.
- The specific heat of an object can be measured using this principle.
संबंधित प्रश्न
What do you understand by the following statements:
The heat capacity of the body is 60JK-1.
Discuss the role of high specific heat capacity of water with reference to climate in coastal areas.
Water is used in hot water bottles for fomentation. Give a reason.
Give one example where high specific heat capacity of water is used as heat reservoir ?
Explain the term boiling ?
How does green house effect help in keeping the temperature of earth’s surface suitable for living of human beings?
Define heat capacity.
A liquid X has specific heat capacity higher than the liquid Y. Which liquid is useful as heat reservoir to keep juice bottles without freezing?
Does the specific heat capacity of a substance depend upon its mass and rise in temperature only?
Discuss how high specific heat capacity of water helps in formation of land and sea breeze.
The temperature of a lead piece of mass 400 g rises from 20°C to 50°C when 1560 J of heat is supplied to it. Calculate: Heat capacity of lead piece.
Derive Mayer’s relation.
Write a short note.
Specific heat capacity
The heat capacity of the vessel of mass 100 kg is 8000 J/°K. Find its specific heat capacity.
A diatomic gas undergoes adiabatic change. Its pressure 'P' and temperature 'T' are related as p ∝ Tx, where x is ______.
The molar specific heat of an ideal gas at constant pressure and constant volume is 'Cp' and 'Cv' respectively. If 'R' is the universal gas constant and the ratio 'Cp' to 'Cv' is 'γ' then CV = ______.
Which of the following substances (A, B and C) has the highest specific heat?
A block of ice of mass 120 g at temperature 0°C is put in 300 gm of water at 25°C. The xg of ice melts as the temperature of the water reaches 0°C. The value of x is ______.
[Use: Specific heat capacity of water = 4200 Jkg-1K-1, Latent heat of ice = 3.5 × 105 Jkg-1]
Specific heat capacity of a substance X is 1900 Jkg-1°C-1 means ______.
