Melting and Freezing

Nov 01, 2012

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Melting and Freezing. Cold. Hot. Cold. Solid. Liquid. Liquid. Gas. Hot. Cold. Melting. Freezing. Evaporating. Condensing. Hot.

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Melting and Freezing

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Melting and Freezing
Cold Hot
Cold Solid Liquid Liquid Gas Hot
Cold Melting Freezing Evaporating Condensing Hot

Freezing

Freezing Rick Sloan FCS Agent What will we learn? Principles of Freezing Freezers Packaging Materials Freezing Foods Shelf-life of Frozen Foods Emergencies Home Food Preservation 2 Principles of Freezing Home Food Preservation 3 Principles of Freezing Does not sterilize food.

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What is the difference between freezing and melting

Freezing Point. The temperature at which a liquid becomes a solidLiquids start freezing at 32 degrees Fahrenheit.. Melting Point. The point at which a solid becomes a liquidSolids start melting at 32 degrees Fahrenheit. . Why does freezing and melting both occur at 32 degrees Fahrenheit?. 32 degrees Fahrenheit is both the freezing and boiling point. At this point a solid can start to melt. At this same point a liquid will start to freeze.32 degrees Fahrenheit is the turning point for both 24

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Freezing and dehydration

Freezing and dehydration. Freezing. There are different methods of commercial freezing available, but they are all based on two principles. 1) Very low temperatures inhibit growth of micro-organisms and limit enzyme and chemical activity.

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Boiling and Freezing

Boiling and Freezing. Chapter 14. Boiling. The process in which a liquid changes phase to a gas. Boiling Point. The temperature at which, under “Standard” conditions, a liquid will change into a gas. Boiling Point.

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Freezing/Melting and Boiling Points

Freezing/Melting and Boiling Points. Spacing of Molecules in a Solid, Liquid, & Gas. Use this link http://www.chem.purdue.edu/gchelp/liquids/character.html. cools. rain. snow. Freezing/Melting Point. What is freezing point? It is the temperature at which a liquid becomes a solid. warms.

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SOLID TO LIQUID: MELTING LIQUID TO SOLID: FREEZING GAS TO LIQUID: CONDENSATION

Summary of the three States of Matter ALSO CALLED PHASES, HAPPENS BY CHANGING THE TEMPERATURE AND/OR PRESSURE OF A SUBSTANCE. GAS : total disorder; mostly empty space; particles have complete freedom of motion (vibrational, rotational, & translational); particles are very far apart.

353 views • 10 slides

Physical Properties of Water Boiling Point, Melting Point and Freezing Point

TEKS 5.7D 5.5 The student knows that matter has physical properties and those properties determine how matter is classified, changed, and used. The students is expected to: 5.5B identify the boiling and freezing/melting points of water on the Celsius scale. Physical Properties of Water

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Model Representation of Freezing and Melting: Anticipation of Model-Dependent Thermal Biases or

Model Representation of Freezing and Melting: Anticipation of Model-Dependent Thermal Biases or Why Melting Snow Made Me Happy as a Child (without me knowing it!). Sandy Lackmann, age 2. Cary, NC, 25 January 2000. MSC/COMET Presentation, 23 February 2001. Gary M. Lackmann

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Freezing, Melting, and Evaporation

Freezing, Melting, and Evaporation. Science Lesson 17 TCAP Coach. Objectives. SPI 0507.9.2 Describe the differences among freezing, melting, and evaporation SPI 0507.9.3 Describe factors that influence the rate at which different types of material freeze, melt, or evaporate.

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Freezing, Melting, and Evaporation

Freezing, Melting, and Evaporation. Agenda: none (make sure you finished your tcap practice questions from Friday—I will take up tomorrow.)

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Melting and Freezing, Boiling and Evaporation

Melting and Freezing, Boiling and Evaporation. Done by : Fan Yiheng. Melting and Freezing. Why they happen at the same temperature?. My Hypothesis: It is because the two differ only in the direction from which the change in state is approached.

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MELTING AND BOILING

MELTING AND BOILING. SEC 3 PHYSICS. On the Molecular Level. We have learnt previously that when molecules absorb heat energy, they will start to move faster.

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Freezing and dehydration

DRAFT ONLY. Freezing and dehydration. Extension. Learning objectives. To understand the different types of processes used in freezing and dehydration. Freezing. There are different methods of commercial freezing available, but they are all based on two principles.

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MELTING

MELTING. Asmita Shah and Idekaa Dang 5c. INTRODUCTION. Solid -> liquid To change a solid to a liquid state by the application of heat . When solid molecules heated ,they loosen up and get more energy . The intermolecular space gets bigger. EXAMPLES Ice Water

299 views • 5 slides

FREEZING

FREEZING. By SHUBHAM KALANTRI AND JAI SINGH RAWAT 5-B. This is a picture of water turning to an iceberg. DEFINITION AND EXAMPLES. Freezing is the change of state in which a liquid changes into a solid on cooling and the heat is released. For example: Water to Ice Milk to Ice Cream

493 views • 5 slides

Pre-Lab 10B: Determining Freezing/Melting Point

Pre-Lab 10B: Determining Freezing/Melting Point. Purpose. A cooling/heating curve is a plot of temperature vs. time/energy graph . It illustrates the effect on a substance as the temperature decreases/increases through a phase change .

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Melting Points and Mixed Melting Points

Melting Points and Mixed Melting Points. Experiment 1: Identify a compound by its melting point and mixed melting points. 113 - 115 o C 188 - 189 o C 183 - 186 o C 133 - 134 o C 135 - 137 o C 113 - 115 o C 110 - 113 o C 187 - 189 o C 133 - 135 o C. Acetamide

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Freezing, Melting, and Evaporation

Freezing, Melting, and Evaporation. SPI 0507.9.2 Describe the differences among freezing, melting, and evaporation. SPI 0507.9.3 Describe factors that influence the rate at which different types of material freeze, melt, or evaporate. Part 1 - Definitions. Melting Freezing Boiling

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SOLID TO LIQUID: MELTING LIQUID TO SOLID: FREEZING GAS TO LIQUID: CONDENSATION

PHASE TRANSISTIONS ALSO CALLED CHANGES OF STATE, HAPPENS BY CHANGING THE TEMPERATURE AND/OR PRESSURE OF A SUBSTANCE. SOLID TO LIQUID: MELTING LIQUID TO SOLID: FREEZING GAS TO LIQUID: CONDENSATION LIQUID TO GAS: EVAPORATION SOLID TO GAS: SUBLIMATION GAS TO SOLID: DEPOSITION.

919 views • 23 slides

Melting and Dissolving

Melting and Dissolving. FOSS Kit: Chemical Interactions 8th Grade. Sometimes solids turn into liquids. How does that happen? Some say dissolving and some say melting. That’s confusing. Write this down in notebook. What is dissolving and what makes it happen?

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MELTING AND BOILING

MELTING AND BOILING. SEC 3 PHYSICS. Melting. Let us recall; Melting is a change of state from solid to liquid. Melting occurs at a fixed temperature. This temperature is known as the melting point of the substance. Eg. Melting point of water is 0 o C or 273 K. Melting.

830 views • 41 slides

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