Chemistry- States of Matter 0.0 / 5 ? ChemistryAtoms and compoundsIGCSECIE Created by: KitsuneCreated on: 28-06-16 13:18 What is the Brownian motion? Random motion of particles as they are struck by moving particles 1 of 29 What evidence is there for the Brownian motion? Dust dancing in the air, cooking smells spreading, potassium manganate dissolving in water, bromine spreading in air 2 of 29 What is diffusion? Movement of particles from an area of higher concentration to an area of lower concentration in liquid or gas until equilibrium is reached 3 of 29 Why does diffusion occur? Because the particles are being struck by other moving particles a 4 of 29 What does the rate of diffusion depend on? Molecular mass 5 of 29 What is an atom? Smallest particle in nature that can't be broken down further by chemical means 6 of 29 What is a molecule? A group of atoms held together by covalent bonds 7 of 29 What is an ion? An atom or a group of atoms that carries a charge because of the imbalance of protons and electrons 8 of 29 State the properties of a solid Fixed shape, fixed volume, doesn't flow, can't be compressed 9 of 29 State the properties of a liquid Fixed volume no fixed shape, hard to compress, easily flows, takes form of the container 10 of 29 State the properties of a gas No fixed volume, no fixed shape, spreads out to fill the container, can be compressed, lighter than solid or liquid 11 of 29 What happens to the temperature when a change of state takes place? It doesn't change 12 of 29 What is the opposite of evaporation? Condensation 13 of 29 What is the opposite of melting? Freezing or solidifying 14 of 29 What are the melting and boiling points of water? Boils at 100 and melts at 0 15 of 29 What is the change of state from solid to gas? Sublimation 16 of 29 What substances change state from solid to gas? Frozen carbon dioxide, iodine crystals, naphthalene 17 of 29 What is naphthalene? An organic compound, C10H8, used in mothballs 18 of 29 What is the change of state from gas to solid called? Deposition 19 of 29 How are the particles in a solid arranged? In a lattice with strong forces between them, they vibrate 20 of 29 How are the particles in a liquid arranged? They slide over each other, close together, forces aren't as strong as in a solid 21 of 29 How are the particles in a gas arranged? Far apart, almost no forces between them, they collide and bounce off 22 of 29 What is the kinetic particle theory? Substances can be in different states and their particles will be arranged differently. A substance will have different characteristics in each state. 23 of 29 What causes pressure in gas? As a container is filled with gas particles they collide with each other and hit the sides of the container, exerting pressure 24 of 29 What does pressure depend on? Temperature and volume 25 of 29 What is the effect of temperature on pressure? When a gas is heated the particles have more energy so they move faster and hit the walls more often with greater forces the pressure increases 26 of 29 What is the effect of compression on pressure? Particles one closer together so there is less space between them and they hit the walls more often. Pressure increases. 27 of 29 What can you compress? A gas, but not liquids or solids as the particles are already close together 28 of 29 What does the rate of diffusion depend on? The mass of the particles and the temperature 29 of 29
Comments
No comments have yet been made