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This lesson breifly explains the concepts of condensation..also it provides with quick summary of all the previous videos in one go to recap all the previous concepts...

Gargee Vats
Self motivated..hard working ..passionate about teaching and curious to learn new things...

U
Unacademy user
Kunal Mishra
2 years ago
welcome Vikram :)
AA
ThankYou so Much Dear Mam Please make more chapter videos... (y)
thnx, make more chapter video
very good work keep it up
Gargee Vats
a year ago
thanku
Gargee Vats
2 years ago
thank you so much
  1. CLASS IX NCERT SCIENCE Chapter 1 Matter in our surroundings


  2. About Me: Gargee Vats Pursing B.tech from G. B. Pant University of agriculture and technology, Uttarakhand Preparing for UPSC CSE. Learning enthusiast. Please do Like , Share and Recommend.


  3. CONDENSATION Condensation is the process through which gas changes into a liquid when it touches a cooler surface. It is opposite of evaporation.



  4. Example : We can see tiny water droplets on the outer surface of tumbler containing crushed ice because the vapour in air comes in contact with glass tumbler and hence condenses.This also shows presence of water vapour in air.


  5. What is Matter???? Anything that has mass and occupies space (volume). What is it made of??? Matter consists of particles which act as a building block.


  6. Characteristics of Matter Particles of matter have space between them. Particles of matter are continuously moving. Posses Kinetic Energy. Temperature is directly proportional to K.E. Particles of matter attract each other. Particles of matter are very very small in size.


  7. Space between particles of matter in different states.... Solid Liquid Gas


  8. Particles of salt gets into spaces between the particles of matter Water Water -Water Add salt Stir -Salt Particles of water magnified millions of times Salt


  9. Particles of matter are constantly moving Fragnance of incense stick Ink in a water beaker


  10. STATES OF MATTER (on basis of physical properties) Gas Liquid Plasma Bose- Einstein condensate Solid Matter



  11. Rate of Diffusion solids liquids Gases


  12. Diffusion in Solids Diffusion in solids is very very slow. People often think that it does not take place bt it does. Example-if we write something on blackboard and leave it uncleaned for considerable period of time (15-20 days) we will find it difficult to clean the board afterwards. Why??2?? Some of particles have diffused in the surface of blackboard.


  13. Diffusion in Liquids Slower than gases but faster than solids. Becase liquid s have greater space and can move much faster than solids Example-spreading of ink in water, spreading of purple colour of potassium permanganate into water on its own.


  14. Quick Recap Solid to liquid : 1. process is melting. 2.temperature is melting point. 3. change of physical state. 4.temperature remains same. Liquid to gases : 1. process is boiling. 2.temperature is boiling point. 3. change of physical state. 4.temperature remains same.


  15. LATENT HEAT The heat absorbed is used to change the state by overcoming the force of attraction between particles - latent heat (hidden) 1. Latent heat of fusion. 2. Latent heat of vapourisation.


  16. latent heat SOLID LIQUID


  17. Factors evaporation temperature evaporation surface area


  18. We wear cotton clothes in winter. Water kept in an earthern pot becomes cool during summer.


  19. Example : We can see tiny water droplets on the outer surface of tumbler containing crushed ice because the vapour in air comes in contact with glass tumbler and hence condenses.This also shows presence of water vapour in air.