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Kinetic model of matter

This is a summary of the topic "Kinetic model of matter" in the GCE O levels subject: Physics. Students taking either the combined science (chemistry/physics) or pure Physics will find this useful. These slides are prepared according to the learning outcomes required by the examinations board.
Published on: Mar 3, 2016
Published in: Education

Transcripts - Kinetic model of matter

• 1. KINETIC MODEL OF MATTER
• 2. KINETIC MODEL OF MATTER
• 3. KINETIC MODEL OF MATTER The kinetic model of matter states that the matters are made up of tiny particles that are always in continuous random motion.
• 4. KINETIC MODEL OF MATTER State of matter Particle arrangement Particle movement Solid Closely packed in a regular arrangement. Large number of particles per unit volume. Have the highest densities. Particles vibrate around fixed positions and held together by strong attractive forces. Have fixed volumes and shapes. Liquid Randomly arranged and slightly further apart. Slightly less number of particles per unit volume compared to solids. Relatively high densities. Particles are free to move about within the liquid held together by attractive forces. Have fixed volumes but not shapes. Gas Randomly arranged and very far apart. Small number of particles per unit volume. Low densities. Particles move about randomly at high speeds with little attraction. Have no fixed volume and shape, and are compressible.
• 5. BROWNIAN MOTION
• 6. BROWNIAN MOTION Brownian motion is the random movement of particles that are suspended in a liquid. When the liquid is heated, the particles gain kinetic energy and move faster and more vigorously.
• 7. DIFFUSION Diffusion is the net movement of molecules or atoms from a region of high concentration to a region of low concentration.
• 8. PRESSURE IN GASES
• 9. PRESSURE IN GASES Gas pressure is generated due to the collision of the gas molecules onto the walls of their holding container.
• 10. PRESSURE IN GASES The presssure, p of a fixed mass of gas is directly proportional to its temperature, provided its volume remains constant. It may be expressed as p ∝T. Pressure Temperature Pressure againstTemperature
• 11. PRESSURE IN GASES The pressure p of a fixed mass of gas is inversely proportional to its volumeV, provided its temperature remains constant. It may be expressed as p ∝ 1 𝑉 or p = 𝑘 𝑉 , where k is a constant. Pressure Volume Pressure against volume
• 12. PRESSURE IN GASES The volume,V of a fixed mass of gas is directly proportional to its temperatureT, provided its pressure remains constant. It may be expressed asV ∝T. Pressure 1/V Pressure against 1/V
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