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Name: ___________________________________________________1438275102870Physical Behavior of MatterHeating and Cooling Curves00Physical Behavior of MatterHeating and Cooling Curves OBJECTIVES:Be able to distinguish between molecules in each phase of matterPredict phases of matter by location on a heating/cooling curve graphCreate a cooling curve when given data and identify phase changes, E changes0654050Model 1 represents molecules in the three phases of matter. Based on what you already know about these phases, complete the table that follows. A word bank has been provided for the last column.1819275514350DEGF00DEGFMODEL 1: PHASE CHANGE PARTICLE DIAGRAMWord Bank for Column 3:GasMelting/FusionVaporizationSolidFreezingLiquidCondensation COLUMN 1COLUMN 2COLUMN 3DESCRIBE THE PARTICLE DIAGRAMWHAT PHASE IS THIS?PARTICLE DIAGRAM APARTICLE DIAGRAM BPARTICLE DIAGRAM CIS HEAT BEING ADDED OR RELEASED (TAKEN AWAY)?WHAT PROCESS (PHASE CHANGE) IS OCCURING?ARROW D (FROM A TO B)ARROW E (FROM B TO C)ARROW F (FROM C TO B)ARROW G (FROM B TO A)Look at the word ENDOTHERMIC. Based on the prefix endo-, do you think energy is being added (entering), or being released (exiting)? ____________________________________________________________Which phase change processes indicate an ENDOTHERMIC reaction? ________________________________Look at the word EXOTHERMIC. Based on the prefix exo-, do you think energy is being added (entering), or being released (exiting)? ____________________________________________________________Which phase change processes indicate an EXOTHERMIC reaction? __________________________________MODEL 2: HEATING CURVE GRAPH1290320365760WORD BANKTemperatureTimeMelting/Freezing PointSolidLiquidGas Boiling/Vaporization Point00WORD BANKTemperatureTimeMelting/Freezing PointSolidLiquidGas Boiling/Vaporization PointThe following graph shows what happens to water as it goes from ice to liquid water to water vapor. Use the word bank and heating curve graph below to identify these phases and phase changes. 14287529210825507620X axis Label:Y axis Label:1.2.3.00X axis Label:Y axis Label:1.2.3.4762515875Now draw a particle diagram for locations 1, 2, and 3 on the heat curve. **Remember that you are drawing these particle diagrams for WATER**Particle diagram #1Particle diagram #2Particle diagram #345847006985002748915698500938530698500How do the particles in a solid, liquid and gas differ? _____________________________________________________________________________________________________________________________________________________________________________________Now check your answers with this graph. Then use this graph to answer the questions that follow.30480045720001. During which line segment(s) does temperature increase? _______________________________________________________2. During which line segment(s) is there no change in temperature? _______________________________________________3. If this substance were water, at what temperature would segment B – C occur? _______________________________4. If this substance were water, at what temperature would segment D – E occur? _______________________________5. Kinetic energy is the energy of motion. It can be used interchangeably with the word temperature. Which line segment(s) show an increase in kinetic energy? ___________________________________________________________6. Potential energy is stored energy. When kinetic energy is not increasing, but heat is still being added to the system this potential energy increases. Which line segment(s) show this? __________________________________7. Compare segments B – C and D – E. Why is segment D – E is longer than B – C? 9525250825BIG IDEA- As temperature increases, substances go from the ______________________ to the _________________________ to the __________________________ phase. This shows an increase in _________________________ energy.- Potential energy increases when a substance is ___________________________ and ____________________________. These are _____________________________ reactions because energy is being added.00BIG IDEA- As temperature increases, substances go from the ______________________ to the _________________________ to the __________________________ phase. This shows an increase in _________________________ energy.- Potential energy increases when a substance is ___________________________ and ____________________________. These are _____________________________ reactions because energy is being added.___________________________________________________________________________________________________________________Here are the heating curves for 4 different substances. Use these curves to answer the questions that follow.Which substance does have the highest boiling point? _______________________________What is that boiling point of this substance? _____________________ At what temperature range is NaCl a solid? _____________________________What is the melting point for Cl2? ________________________________________Which substance is a liquid at room temperature? _________________________________What phase is Cl2 in at room temperature? _________________________________________What is NaCl’s boiling point? _________________________________________What phase is water in at -100?C? ____________________________________What temperature is Cl2 at after being heated for 20 minutes? ______________________________________38957251841500Draw a particle diagram for Cl2 at temperature of 50?C.408622522098000Draw a particle diagram of NaCl at a temperature of 500?C.5657850-133350You will now take what you have learned and infer that knowledge to create a Cooling Curve. A cooling curve is simply the opposite of a heating curve- instead of temperature INCREASING, it is DECREASING. Use the information below to create this Cooling Curve for the unknown substance.-A sample of a substance is cooled from a temperature of 250°C to 10°C over a period of two hours. -The boiling point of the substance is 175°C and the melting point is 22°C. 113347579375002667006350TEMPERATURE00TEMPERATURE11430002984500TIMENow clearly label the following items in the appropriate locations.(KE= kinetic energy, PE= potential energy)Solid Liquid Gas Condensation BoilingFreezing Point Melting Point Fusion KE changing KE not changingPE changingPE not changing38100361950BIG IDEA- As temperature decreases, substances go from the ______________________ to the _________________________ to the __________________________ phase. This shows an decrease in _________________________ energy.- Potential energy increases when a substance is ___________________________ and ____________________________. These are _____________________________ reactions because energy is being released.00BIG IDEA- As temperature decreases, substances go from the ______________________ to the _________________________ to the __________________________ phase. This shows an decrease in _________________________ energy.- Potential energy increases when a substance is ___________________________ and ____________________________. These are _____________________________ reactions because energy is being released.Putting it all together:11430001460536429951727204100412776855250190 3200 32Fill in the arrows with the missing information from the particle diagrams above.1: ______________________________________________________2: _____________________________________________________3: _____________________________________________________ 4: _____________________________________________________483870022225Which statement correctly describes the energy of the particles of the sample during interval BC?(a) Potential energy decreases and average kinetic energy increases.(b) Potential energy increases and average kinetic energy increases.(c) Potential energy increases and average kinetic energy remains the same.(d) Potential energy remains the same and average kinetic energy increases3. Which line segment is a liquid, only? __________________1771650481965Use the following graph to help you answer questions 4 and 5. The graph below represents the uniform heating of a substance, starting with the substance as a solid below its melting point.Which line segment represents an increase in potential energy and no change in average kinetic energy? (b)(c)(d)5. CIRCLE ONE: This graph represents an ( endothermic / exothermic ) reaction. Some portions of this pogil were authored by: Erin Graham; Revised by: Josephine Parlagreco, Lizabeth Tumminello Edited by Linda Padwa and David Hanson, Stony Brook University. Regents questions from June 2009 NYS exam. Heating Curves from GCSD website. ................
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