मराठी
महाराष्ट्र राज्य शिक्षण मंडळएस.एस.सी (इंग्रजी माध्यम) इयत्ता १० वी

Write scientific reason. Even if boiling water is constantly heated, its temperature does not rise. - Science and Technology 1

Advertisements
Advertisements

प्रश्न

Write scientific reason.

Even if boiling water is constantly heated, its temperature does not rise.

स्पष्ट करा
टीपा लिहा

उत्तर

  1. The heat energy absorbed at a constant temperature during transformation of liquid into a gas is called the latent heat of vaporisation.
  2. When heat is supplied to boiling water, it is used to weaken the bonding between molecules of water, causing transformation from liquid state to gaseous state, i.e., steam.
  3. As the heat supplied is utilized for the change of state entirely, temperature of water does not change.
shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 5: Heat - Write scientific reasons

संबंधित प्रश्‍न

State two characteristics of a good thermion emitter.


What is meant by latent heat? How will the state of matter transform if latent heat is given off?


A thermally insulated pot has 150 g ice at temperature 0°C. How much steam of 100°C has to be mixed to it, so that water of temperature 50°C will be obtained? (Given : latent heat of melting of ice = 80 cal/g, latent heat of vaporization of water = 540 cal/g, specific heat of water = 1 cal/g °C)


Explain the following temperature vs time graph.


Name the physical quantity that measures the degree of hotness.

Define the following terms:
(i) Latent heat,
(ii) Latent heat of fusion of ice.


What is the name given to the energy absorbed during a phase change?


Define specific latent heat of vaporization of a substance.


Give one consequence of the high specific latent heat of fusion of ice.


Why do we feel much comfortable when we sit under a moving fan especially when our body is sweating?


When ice is converted into water : constant temperature : : before the water evaporates : _______


Find the odd one out and give its explanation.


During reheating, ice is converted to water at a temperature of 0 °C.


Write scientific reason.

Use a pressure cooker to cook food in cold air.


Write scientific reason.

The bottom of some steel utensils used for cooking is copper.


Define specific latent heat capacity


600 g of copper at 50°C is mixed with lOOOg water at 20°C. Find the final temperature of the mixture. The specific heat capacity of copper is 0.4 Jg-1°C-1 and that of water is 4.2 Jg-1°C-1


The amount of heat energy required to melt a given mass of a substance at its melting point without any rise in its temperature is called as the ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×