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Q3_GENCHEM2_Lecture 5_Phase Diagram.pptx
- 1. Lesson 5 Phase Diagram of Waterand Carbon Dioxide M A R I Z A R . M A PA LO S U B J E C T T E A C H E R General Chemistry 2
- 2. SOLID GAS LIQUID Melting Freezing S u b l i m a t i o n D e p o s i t i o n C o n d e n s a t i o n v a p o r i z a t i o n How is temperatureand pressure affects the phase change?
- 3. Study the figure,what can you infer about the changing of phases of matter as temperature
- 4. Study the figure,what can you infer about the changing of phases of matter as pressure increases? • The state of matter of a substance is attributed to the distance between the particles which make the substance. • when pressure is applied on gas, it compresses to liquid and when pressure is increased on liquid, it becomes solid.
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- 8. The Phase Diagramof Water
- 9. What is aPhase Diagram? A phase diagram is a graphical representation of the various phases of a substance or mixture of substances that coexist in thermodynamic equilibrium, and undergo phase changes under different working conditions, such as temperature, pressure, or volume.
- 10. What is aPhase Diagram? • The water system is divided into three phases: • ICE (S), • WATER (L), and • WATER VAPOUR (G)
- 11. Tripple Point ofWater • The triple point occurs where the solid, liquid, and gas transition curves meet. • The triple point is the only condition in which all three phases can coexist, and is unique for every material. • Water reaches its triple point at just above freezing (0.1° C) and at a pressure of 0.006 atm.
- 12. A phase diagramcombines plots of pressure versus temperature for the liquid-gas, solid-liquid, and solid-gas phase-transition equilibria of a substance.
- 13. Phase diagram indicatethe chemical states that exist under specific conditions of pressure and temperature and provide the pressure dependence of the phase-transition temperatures (melting points, sublimation points, boiling points). . physical
- 14. The “liquid-vapor” curve separatesthe liquid and gaseous regions of the phase diagram and provides the boiling point for water at any pressure.
- 15. The solid-vapor curve, labeledAB indicates the temperatures and pressures at which ice and water vapor are in equilibrium.
- 16. The lines separatingthe three phases intersect at a single point, the supercritical fluid, which is the only combination of temperature and pressure at which all three phases can coexist in equilibrium. Tripple point
- 17. What happens to thetemperature of a block of ice when you put a Bunsen burner underneath it?
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- 20. The temperature goesup the longer the heating continues. There are two horizontal flat parts (segments BC and DE) to the graph. The plateaus are also called phase changes. Heating curve
- 21. The first changeof state (segment BC) is melting (changing from a solid to a liquid). The temperature stays the same while a substance melt. Heating curve
- 22. The second changeof state (segment DE) is boiling (changing from a liquid to a gas). The temperature stays the same while a substance boil. Heating curve
- 23. For water, thistemperature is 100°C because the boiling point for water is 100°C. Over the course of this line segment, both liquid and gas exist in various ratios, starting at 100% liquid and ending at 100% gas. Heating curve
- 24. FREEZING A MELTING B CONDENSATION C VAPORIZATION D Whatis the phase change as a substance changes from a liquid to a solid?
- 25. FREEZING A MELTING B CONDENSATION C VAPORIZATION D Whena gas turns into a liquid, what do you call this phase change?
- 26. FREEZING A MELTING B CONDENSATION C VAPORIZATION D Anaboils water and notices a “smoke” comes out of the kettle. She knew that it is the water vapor that occurs. What is the phase change happening when liquid turns into water vapor?
- 27. FREEZING A MELTING B CONDENSATION C VAPORIZATION D Amethystplace the cubes of butter near her kitchen window. After few minutes, she notices that the butter flows in the plate. What process occurs in the butter?
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