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Explain Diffusion in Chemistry and give examples in all states of matter Diffusion Diffusion is the movement of particles from an area of high concentration to an area of low concentration. For this to occur the particles must be able to move so this occurs only in gases liquids and does not occur in solids because particles have no gaps in between them enough for the diffusion to occur. Examples for Diffusion Solid particles Diffusing in Liquid particles When small solid pieces of solid iodine or potassium manganate(VII) are dissolved in water the solid particles diffuse in between the water particles and cause the solution to be colored with the iodine color Examples for Diffusion Solid particles Diffusing in Gas particles When you are throwing some small stones in the air , the solid particles of stones diffuses in between the air gas particles Examples for Diffusion Gas particles Diffusing in Liquid particles The particles of Carbon dioxide gas diffusing in water of a Carbonated drink is a perfected example. Examples for Diffusion Gas particles Diffusing in another Gas particles An example is the diffusion of bromine gas particles through air particles Examples for Diffusion Liquid particles Diffusing in Gas particles Drops in rain falling in between air particles Examples for Diffusion Liquid particles Diffusing in another liquid particles that what happens when you mix liquids together In all those examples, particles mix by colliding with each other and bouncing off in all directions. This mixing process is called diffusion. The overall result is the flow of particles from where they are more concentrated to where they are less concentrated, until they are evenly spread out. Rate of Diffusion of Gases Download as PDF

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Particulate Nature of Matter for IGCSE CIE Questions Part 1 Questions show only in Desktop view See Also Questions Part 2 Questions Part 3 Questions Part 4

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grade-12-sabis-chapter-4 Page Top Chapter Notes Top Menu Chapter 4 Content Summary (Tap a question name to view it) 33. Molar concentration: number of moles of solute per L of solution. 34. Concentration calculations: BQ1 , BQ2 , BQ5 , SQ 3, SQ4 35. Dilution calculations. BQ3 , BQ4 Chapter Notes Top Menu Chapter 4 Notes Well Explained Chapter Notes Top Menu Chapter Notes Top Menu Chapter Notes Top Menu Basic Question 1 BQ1 Course Revision Questions Top Menu Basic Question 1 Explaining Similar Question Practice (Finding mass) Similar Questions Practice (finding Molar mass) Similar Questions Practice Basic Question 2 BQ2 SQ BQ3 Basic Question 3 BQ4 Basic Question 4 BQ5 Basic Question 5 Course Revision Questions Top Menu Course Revision Questions Videos 🎥 All Chapter Videos Top Menu

Discover comprehensive and engaging resources for Chemistry IGCSE students, including lessons, quizzes, and more. Join our community of students and educators today Cambridge IGCSE Chemistry 0620 The Ultimate Summary with MCQs OCT/NOV 2023 Topic 1 . PDF States of Matter Topic 2 . PDF Atoms Elements and Compounds Part 1 Topic 3. PDF Atoms Elements and Compounds Part 2 Topic 4. PDF Topic 5. PDF Electrochemistry Topic 6. PDF Thermochemistry Topic 7. PDF Chemical react ions Part 1 Topic 7. PDF Chemical reactions Part 2 Topic 7.Part3 Topic 8. PDF Acids Bases and Salts Topic 9. PDF Topic 10. PDF Topic 11. PDF Topic 12. PDF More Revision For IGCSE Exams Organic Chemistry Download Full Syllabus (Cambridge Website)

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Explain the Changes of state in terms of the Kinetic Theory IGCSE CHEMISTRY CAMBRIDGE 1.Particulate Nature of Matter 1.2 Changes in States Of Matter Back to Chapter 1 Menu Notes : Freezing : From liquid to solid Melting : From solid to liquid Boiling : From liquid to gas Condensation : From gas to liquid Sublimation : From Solid to gas directly Explain the Changes of state in terms of the Kinetic Theory To Change Matter from one physical state to another a certain amount of energy has to be absorbed or released. The amount of energy needed depends on the strength of the attraction forces between the particles of the substance. The stronger the forces of attraction between the particles the larger the amount of energy required. Melting Changing from a solid to liquid state by heating . Heat is absorbed to break the bonds between the solid particles and change it into liquid ( heat is changed into kinetic energy which makes the particles vibrate faster so it can break the bonds between them and change into liquid state). Happens at the Melting point. Boiling Changing from a liquid to gas state by heating . Occurs below the surface of the liquid. Requires heat to be absorbed to break the bonds between the liquid particles and change it into gas ( heat is changed into kinetic energy which makes the particles move faster so it can break the bonds between them and change into gas state ). Happens at the Boiling point. Evaporation Changing from a liquid to gas state. occurs only at the surface of the liquid. Requires heat to be absorbed to break the bonds between the liquid particles and change it into gas ( heat is changed into kinetic energy which makes the particles move faster so it can break the bonds between them). Freezing Changing from a liquid to solid state by decreasing temperature . Requires heat to be released (lost from system) to make new bonds between the liquid particles and change it into solid ( losing heat decreases the kinetic energy of the particles which makes the particles move slower and stick together) Happens at the Freezing point. Note : Freezing point and Melting point has the same value it depends only in the direction of change in state From Solid to liquid (Melting point) From liquid to solid (Freezing point) Condensation Changing from a gas to liquid state. Requires heat to be released (lost from system) to make new bonds between the gas particles and change it into liquid ( losing heat decreases the kinetic energy of the particles which makes the particles move slower) Note that condensation is the opposite of evaporation Sublimation Changing from a solid to gas directly. It happens in certain types of substances , and is related to the nature of the substance not to the method of heating. example : Solid iodine , solid carbon dioxide , solid ammonium chloride. The reverse reaction also happens and is also called sometimes called deposition or de-sublimation. Sublimation occurs at a specific temperature which is unique for a pure substance. Describe qualitatively the pressure and the temperature of a gas in terms of motion of its particles As mentioned earlier the particles of gas moves rapidly and randomly in all directions this causes the particles of gas to collide with each other and with the walls of its container. this causes the particles to exert pressure. The Higher the temperature the more rapid the particles will hit each other and collide with the walls of the container exerting higher pressure. When the gas is compressed to a smaller volume , the particles also hit each other more frequently and hit the walls more frequently increasing the gas pressure. List of Topics Download as PDF