Pre-read Chapter 16 Section 1 Write 3 important facts, in complete sentences, about each state of matter that would help you answer the lesson essential question. Number each fact! Write 2 Questions that you still have over the reading. This will count as your reflection tonight! Grab your folder!!!! Have out reflections/notes from yesterday to be stamped! Look at the display in front of the room… Describe, in complete sentences, what you see in each box. Ask the people at your table your 2 questions and see if they can answer them. Work on Test corrections when you are finished!!! Bell Ringer 09/06/2012 Write Question and Answer What is capillary action? Bell Ringer 09/07/2012 Describe and illustrate the physical differences among solids, liquids, and gases in terms of their mass, volume, density, shape, and particle arrangement. UEQ: How does the structure of matter influence its physical and chemical behavior? Choose 1: How to do Vocabulary: Write word and definition. Underline and highlight vocabulary word. Write word on front and definition on back of index cards. Create a poem or rap of vocabulary words and definitions. Create foldable with words and definitions. Create a crossword puzzle. Also make answer key!!! Kinetic theory Property Density Physical property Chemical property Matter Volume Physical change Chemical change What are the 3 assumptions to kinetic theory? All matter composed of small particles (atoms, molecules, ions) Particles are in constant random motion Particles are colliding with each other and the walls of their containers Overall, kinetic energy is how fast the molecules are moving and will do so at all temperatures. Solids Holds shape! Why? Definite shape and Definite volume Not compressible (naturally) because packed tightly Usually most dense phase of a substance because packed tightly Exception: water Definite melting points. Least amount of energy. Movement of particles is slow and around fixed points; but, increases with increase in temperature. Low rate of diffusion b/c low mobility of particles Two types of Solids Crystalline solid Particles are in an orderly, geometric, repeating pattern Have definite melting points Amorphous solid (plastics and glass) Particles are arranged randomly No definite melting points Liquids Definite volume but no definite shape Take shape of container Particles free to move/slide past one another; but, still held together by intermolecular forces Cannot be compressed under common pressure Can transmit pressure equally in all directions Usually less dense than solids; but, more dense than gases Diffuses at average speed Bell Ringer 09/07/2012 Write Question and answer in a complete sentence. Explain what happens in surface tension. Surface Tension Drawing molecules together to decrease surface area Predict: How many drops of water do you think will fit on a penny? Was your prediction correct? Capillary Action When surface of a liquid and solid meet, surface of liquid molecules are pulled upward, against the pull of gravity, along surface of solid Meniscus Observation: What is reading on the graduated cylinder? Gases No fixed shape, no fixed volume Too much energy to remain attached. Particles vibrate at high speeds. Gas takes shape of container by expanding Less dense than solids and liquids Still considered a fluid Can be compressed easily with very little pressure. However, once it is contained, it want to escape the container. Diffusion Spontaneous mixing of particles of two substances caused by random motion Plasmas Once molecule is superheated, electrons leave the atoms in the molecules +/- charged particles Stars, lightening bolts, neon/fluorescent bulbs, auroras Exit slip State of matter with indefinite volume and indefinite shape State of mater with definite volume and definite shape State of matter with definite volume and indefinite shape Homework: Continue to work on Vocabulary. Due Tuesday! Write Questions and Answers ▪ Pg. 483 #’s 1, 2 ▪ Pg. 500-501 #’s 5, 8, 12, 16 ▪ Pg. 502 #s 1, 4, 6, 19 Bell Work 09/11/2012 First, write LEQ above. Write Questions and Answer What are the appropriate units for mass, volume, and density? How do you calculate density? Mass = kg, g Volume = cm³, m³ Density = g/cm³, g/L, g/mL, kg/L, kg/m³ D = M/V Writing a lab report. Follow the template Keep template in reference section of notebook. Use water displacement to obtain Volume -or- calculate mathematically Remember that 1 cm³ = 1 mL To calculate volume of cylinder: Use triple balance beam/electronic balance to measure the mass of object You should have out your lab papers, the reference sheet on how to write a lab report and a separate sheet of paper to write out your lab report! Bell Work 09-17-2012 Write Question and Answer What do you think a density column is? Some liquids are denser than others When you layer them, the denser liquids will sink to bottom Some liquids are denser than others When you layer them, the denser liquids will sink to bottom Write the following information and calculate the density: Water volume: 1.5 mL mass: 1.5g Vegetable oil volume: 1.5 mL mass: 1.38 g Dish soap volume: 1.5 mL mass: 1.59 g Rubbing alcohol volume: 1.5 mL mass: 1.22 g Lamp oil volume: 1.5 mL mass: 1.20 g Bell Work 09-18-2012 Write Question and Answer Observe the magnesium strip. What are some physical properties of magnesium? What are some chemical properties? Propose a way you could physically change the magnesium strip and one way you could chemically change the magnesium strip. What is a property? A unique characteristic that categorizes (groups or identifies) objects/substances together PHYSICAL PROPERTIES Characteristic observed or measured without changing substance Melting point, boiling point, color, size, ductility, malleable, density, ability to conduct heat or electricity CHEMICAL PROPERTIES Ability to change from one substance to a new substance Ability to produce a gas, burn, rust Example: Copper w/ moist air PHYSICAL CHANGES CHEMICAL CHANGES does not change the identity or chemical makeup of the substance Cutting, melting, drawing into wire, crushing, temperature and pressure changes Substance changes into new substance b/c chemical bonds have been broken or made Occurs on molecular level Noticed by temperature change, smell/odor, bubbles (gas), rust formation Reactants products PREDICT: Write down a prediction of what you think will occur upon mixing lead nitrate and potassium iodide. Extra Credit: (3 points to test grade) Search the internet for important uses of Potassium Iodide. Write down any important uses and turn in tomorrow. Also, while you are searching the internet, see if you can find why Potassium Iodide should be stored in a closed amber colored bottle. Bell Work 09-19-2012 Write question and answer. Explain how you could you prove the Law of Conservation of Mass. Law of Conservation of Mass Mass cannot be created or destroyed in ordinary chemical and physical changes Therefore, the mass before the reaction will be equal to the mass after the reaction Homework Assignment: Pg. 465 #’s 1-5 Pg. 470-471 #’s 4, 8, 10, 13-16 Pg. 472 #’s 4, 6, 7 LEQ: When temperature changes, how are the 4 states of matter affected? Vocabulary Write word and definition. Underline and highlight vocabulary word. Write word on front and definition on back of index cards. Create a poem or rap of vocabulary words and definitions. Create foldable with words and definitions. Create a crossword puzzle using words and definitions. Also make answer key!!! Kelvin Celsius Fahrenheit Boyles Law Charles’ Law Bernoulli’s Principle Archimedes Principle Pascal’s Principle Fluid Freezing point Boiling point Melting point Phase diagram Law of conservation of energy/mass Bell Work 09-20-2012 Write question and answer. Explain the difference between evaporation and vaporization. Evaporation is liquid leaving the surface without reaching boiling point. Vaporization is liquid becoming vapor due to boiling. Energy is required to change the states of matter! Phase Changes of Matter Sublimation (dry ice, iodine) Melting (heat of fusion) Vaporization (“boiling” heat of vaporization) Condensation (dew) Solidification (freezing, crystallization) Deposition (fire extinguisher) GAS Matter exists in gaseous state at room temp VAPOR Matter is in gaseous state; but, normally in liquid state at room temp Avg KE doesn’t change at plateau, this is potential energy where atoms/molecules are rearranging Lower plateaus should be shorter because it takes less energy to change state Slopes – kinetic energy What is equilibrium? 2 opposing changes occur at equal rates in a closed system. Occurs at plateaus Boiling point Temp at which vaporized pressure = atmospheric pressure Freezing point Temp at which solid and liquid are in equilibrium at 1 atmospheric pressure Exit slip: Sum up today’s lesson in 6 words!!! Bell Work 09/21/2012 Write Question and Answer Explain the relationship between heat of fusion of a solid and the attraction between the particles. The greater the attraction between the molecules results in greater amount of energy needed to overcome the attraction -or- higher heat of fusion Phase Diagram A graph of the relationship b/t the physical state of a substance and the temperature and pressure of the substance What is triple point? Temperature and pressure conditions where all 3 states of matter exists together at equilibrium What is critical point? The temperature and pressure at which the gas and liquid states of a substance become identical and form one phase Particle of liquid cannot escape due to air pressure pushing down on surface of liquid When liquid particles gain enough KE (from heat) to break through the surface, the liquid boils. This can also occur by decreasing the amount of pressure. Buoyancy-ability of a fluid to exert an upward force on an object that is immersed in it 1. float if weight is less than the buoyant force from the fluid 2. sink if its weight is more than the buoyant force from the fluid 3. Archimedes’ principle – buoyant force on an object is equal to the weight of the fluid displaced by the object 4. float if its density is less than the density of the fluid it is placed in Pascal’s principle: Pressure applied to a fluid is transmitted throughout the fluid Pressure is force exerted/unit area (P= F/A) Force = Newtons Area = m Hydraulic machines use this principle to lift heavy loads (this is because more force is available to lift a heavy load by increasing the surface area) Bernoulli’s principle- as velocity of a fluid increases, the pressure exerted by the fluid decreases; airplanes use this principle to fly Viscosity – a liquid’s resistance to flow 1. molecular structure determines a fluid’s viscosity 2. increased temperature will lower viscosity Low viscosity – thin High viscosity - thick Pressure Is measured in units called pascal (Pa) 1. collisions of particles in air result in atmospheric pressure. 2. Moving particles colliding with the inside walls of a container result in gas pressure and push the walls of the container outward Boyle’s Law-relates pressure and volume Volume decreases as pressure increases Pressure decreases as volume increases Pressure multiplied by volume is always equal to a constant if the temperature is constant Pg. 493 practice problem Pg. 841 numbers 174 and 176 http://www.grc.nasa.gov/WWW/k- 12/airplane/boyle.html Charles’s Law-relates volume and temperature At constant pressure, volume increases as temperature increases At constant pressure volume decreases as temperature decreases http://www.grc.nasa.gov/WWW/k12/airplane/glussac.html Either an element or a compound A type of matter with a fixed composition Element All the atoms in a substance are alike Compound A substance with 2 or more elements combined in a fixed proportion ▪ Example: water, chalk Two or more substances that can be easily separated by physical means Heterogeneous Mixture of different and easily distinguishable materials ▪ Colloid-large particles that never settle (ex. Milk, paint) ▪ Tyndall effect-scatter light ▪ Suspension- containing a liquid in which visible particles settle (ex. Pond water) Homogeneous Contains two or more gaseous, liquid, or solid substances blended (also called a solution) Physical Properties Characteristics of a material which can be observed without changing the identity of the substances in the material Ex: color, shape, size, melting point, and boiling point Appearance Physical description of a substance Behavior How the substance acts; for example magnetism, viscosity, ductility Physical properties such as size and magnetism could be used to separate mixtures Changes in a substance’s size, shape, or state of matter Substance does not change identity Distillation A process for separating a mixture by evaporating a liquid and condensing its vapor Chemical Property Characteristics of a substance indicating that it can change chemically ▪ Example: flammability or light sensitivity of a substance When a substance changes to another substance, a chemical change has occurred. Indicated by temperature change, smell, or bubble formation Rust Chemical changes can be used to separate substances such as metals from ores Weathering of Earth’s surface involves physical and chemical changes Physical – big rocks split into smaller ones, erosion Chemical – in rocks when calcium carbonate in limestone changes to calcium hydrogen carbonate due to acid rain Mass of all substances present before a chemical change equals the mass of all substances after the change