CLASS 9 CHEMISTRY CLASS
CHAPTER 1 Matter in Our Surrounding
Topics in the Chapter
• Introduction
• Physical Nature of Matter
• Diffusion
• Characteristics of Particles of Matter
→ Particles of matter have space between them
→ Particles of matter attract each other because of force of attraction
• States of Matter
→ Solid State
→ Liquid State
→ Gaseous State
• Change of State of Matter
• Effect of Temperature
→ Latent heat
→ Latent heat of fusion
→ Latent heat of vaporisation
• Effect of change of pressure
• Evaporation
→ Factors affecting the rate of evaporation
→ Evaporation causes cooling
• Plasma
• Bose-Einstein Condensate
• Physical Nature of Matter
• Diffusion
• Characteristics of Particles of Matter
→ Particles of matter have space between them
→ Particles of matter attract each other because of force of attraction
• States of Matter
→ Solid State
→ Liquid State
→ Gaseous State
• Change of State of Matter
• Effect of Temperature
→ Latent heat
→ Latent heat of fusion
→ Latent heat of vaporisation
• Effect of change of pressure
• Evaporation
→ Factors affecting the rate of evaporation
→ Evaporation causes cooling
• Plasma
• Bose-Einstein Condensate
Anything that has mass and takes up space is referred to as matter. hydrogen and oxygen, sugar and sand, air and water, etc. Small, minuscule particles make up matter. Due to the space between them, matter particles are attracted to one another.
States of Matter
- Matter can be classified as solid, liquid or gas on the basis of interparticle forces and the arrangement of particles.
- These three forms of matter are interconvertible by increasing or decreasing pressure and temperature. For example, ice can be converted from solid to a liquid by increasing the temperature.
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