हिंदी

Water is used in hot water bottles for fomentation. Give a reason.

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प्रश्न

Water is used in hot water bottles for fomentation. Give a reason.

कारण बताइए
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उत्तर

The reason is that water does not cool quickly due to its large specific heat capacity, so a hot water bottle provides heat energy for fomentation for a long time.

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अध्याय 11: Calorimetry - EXERCISE-11(A) [पृष्ठ २७०]

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सेलिना Concise Physics [English] Class 10 ICSE
अध्याय 11 Calorimetry
EXERCISE-11(A) | Q 25. | पृष्ठ २७०

संबंधित प्रश्न

You have a choice of three metals A, B, and C, of specific heat capacities 900 Jkg-1 °C-1, 380 Jkg-1 °C-1 and 460 Jkg-1 °C-1 respectively, to make a calorimeter. Which material will you select? Justify your answer.


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−1, the Specific heat capacity of water = 4.2J g−1 °C−1)


A refrigerator converts 100 g of water at 20°C to ice at −10°C in 35 minutes. Calculate the average rate of heat extraction in terms of watts.

Given: Specific heat capacity of ice = 2.1 J g−1°C−1

Specific heat capacity of water = 4.2 J g−1°C−1

Specific latent heat of fusion of ice = 336 J g−1


Give a mathematical relation between Heat Capacity and Specific Heat Capacity.


Give one example where high specific heat capacity of water is used as heat reservoir ?


State the effect of enhancement of green house effect.


What impact will climate changes have on the crops of food?


Read the following paragraph and answer the questions.

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.

  1. Heat is transferred from where to where?
  2. Which principle do we learn about from this process?
  3. How will you state the principle briefly?
  4. Which property of the substance is measured using this principle?

Write an expression for the heat energy liberated by a hot body.


The SI unit of specific heat is _______.


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