GCSE Chemistry B (Triple) OCR
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84 topics in 7 modules
☑️ Air and Water 15 topics
- States of Matter
- Changing State
- Chemical Formulas
- Chemical Equations
- Endothermic Reactions
- Exothermic Reactions
- Measuring Temperature Changes
- Bond Energies
- The Evolution of the Atmosphere
- Combustion and Air Pollution
- Greenhouse Gases and Climate Change
- Reducing Pollution
- Tests for Gases
- Fuel Cells
- Potable Water
☑️ Chemical Patterns 11 topics
- The History of the Atom
- The Atom
- Atoms, Ions and Isotopes
- The Periodic Table
- Electronic Structure
- Metals and Non-Metals
- Group 1 Elements
- Group 7 Elements
- Group 0 Elements
- Ionic Bonding
- Ionic Compounds
☑️ Natural Environment Chemicals 13 topics
- Metallic Bonding and Reactivity
- Ionic Equations
- Reactions of Metals
- Extracting Metals
- Oxidation and Reduction
- Electrolysis
- Covalent Bonding
- Simple Covalent Substances
- Homologous Series and Alkanes
- Crude Oil
- Alkenes
- Reactions of Alkenes
- Alcohols and Carboxylic Acids
☑️ Material Choices 9 topics
- Polymers
- Giant Covalent Structures
- Material Properties
- Material Types
- Materials and their Uses
- Corrosion
- Reuse and Recycling
- Life Cycle Assessments
- Nanoparticles
☑️ Chemical Analysis 15 topics
- Purity and Mixtures
- Chromatography
- Separating Mixtures
- Anion Tests
- Cation Tests
- Flame Emission Spectroscopy
- Relative Mass
- Conservation of Mass
- Moles
- Calculations using Balanced Equations
- Percentage Yield
- Gases
- Concentrations
- Acids, Alkalis and Standard Solutions
- Titrations
☑️ Making Chemicals 12 topics
- Acids, Alkalis and pH
- Strong Acids
- Weak Acids
- Reactions of Acids
- Making Salts
- Rates of Reactions
- Catalysts
- Measuring Reaction Rates
- Finding Reaction Rates from Graphs
- Dynamic Equilibrium
- Atom Economy
- Industrial Processes
☑️ Ideas About Science 9 topics
- The Scientific Method
- Designing Investigations
- Collecting Data
- Processing and Presenting Data
- Units and Equations
- Drawing Conclusions
- Uncertainties and Evaluations
- New Technologies and Risk
- Communication and Issues Created by Science
GCSE Chemistry B (Triple) OCR Revision Content
Take a look at the written content available for this course. Practice-question availability may vary.
GCSE Chemistry B (Triple) OCR - Air and Water - States of Matter Content Preview
Air and Water
States of Matter
States of Matter
Solid
- A solid has a fixed volume and shape due to strong intermolecular forces and close packing of particles.
- The particle are unable to move freely; they only vibrate on the spot.
- Solid particles are in a regular arrangement.
- Solids cannot be compressed or squash.
Liquid
- A liquid has a fixed volume but takes the shape of its container because the intermolecular forces are weaker than in solids and particle proximity is still close but not regularly arranged.
- Liquids can move, and slide past each other.
- Liquids are unable to be compressed or squash.
Gas
- A gas fills the entire volume of its container due to very weak intermolecular forces. It can also change shape.
- Gas particles are well separated and move randomly and quickly.
- Gases can be compressed.
Change of States
- Melting is changing from a solid state to a liquid state.
- Freezing is changing from a liquid state to a solid state.
- Vaporization refers to a phase transition from the liquid phase to gas.
- Evaporation is a type of vaporization that occurs on the surface of a liquid as it changes into the gas phase.
- Condensation is the change of a substance from a gas to a liquid.
- Sublimation is the process of transformation directly from the solid phase to the gas phase without passing through an intermediate liquid phase.
- Deposition is the process where the gas transforms into solid without passing through the liquid phase.
Diffusion
- Diffusion occurs when particles spread out through random motion. It's faster in gases than in liquids and solids.
- The rate of diffusion depends on temperature, mass of particles and density of the substance.
Question: What is the main difference between evaporation and vaporization in the context of a change of state of matter?
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