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Alexia Molina, Sofia Batres, Javier Atala, Nelson Frech.

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Presentation on theme: "Alexia Molina, Sofia Batres, Javier Atala, Nelson Frech."— Presentation transcript:

1 Alexia Molina, Sofia Batres, Javier Atala, Nelson Frech

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3 Solids:  Definite shape and definite volume  Particles are close together  2 types: Amorphous and Crystalline Amorphous solids: particles are not arranged in a regular pattern. Crystalline solids: particles are arranged in a pattern.

4  Definite volume but no definite shape  Particles move freely Properties of Liquids:  Surface Tension: an inward pull among the molecules of a liquid that brings the molecules on the surface closer together.  Viscosity: a liquids resistance to flowing

5  No definite shape  No definite volume  Particles move rapidly and they fill all the space available.  Gases are also considered fluids which means substance that flows.

6  Melting: changes from solid to liquid  Most pure substances melt at a specific temperature.  The particles of a solid are vibrating so fast they break free from their fixed position.  Freezing: changes from a liquid to solid.  The particles of a liquid are moving so slow they form regular patterns.

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8  Vaporization: changes from liquid to gas  Particles in a liquid gain enough energy to form a gas.  Evaporation: takes place only in the surface of a liquid.  Boiling: occurs when a liquid changes to a gas below it surface as well as at surface.  Boiling point: the temperature at which a liquid boils.  Condensation: occurs when particles in a gas lose enough thermal energy to form a liquid.

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10  Sublimation: occurs when the surface particles of a solid gain enough energy that they form a gas.  During sublimation particles of a solid do not pass through the liquid state as they form a gas.

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12 Changes of State SolidGasLiquid Vaporization Condensation Melting PointBoiling Point Melting Freezing Deposition Sublimation SolidsLiquidsGases -Crystalline -Amorphous -Surface Tension -Viscosity -Evaporating -Boiling -Particles Fixed Packed: Closely Together -Move Freely -Close -Move Freely -Far Apart -Definite Shape -Definite Volume -Undefined shape -Definite Volume -Undefined Shape -Undefined Volume Fluids

13  Measuring gases  When working with gas, it is helpful to know its volume, temperature, and pressure  Volume: the amount of space that matter files.  Temperature: the measure of the average energy of random motion of the particles in a substance  Pressure: force of its outward push divided by the area of the walls of the container

14 Pressure & VolumeBoyle’s LawInverseT ↑P ↓V ↓P ↑V Pressure & Temperature DirectV ↑P ↑T ↓P ↓T Volume & TemperatureCharles’s Law DirectP ↑V ↑T ↓V ↓T

15 Boyle’s Law Volume (mL) Pressure (kPa)

16 Charles’s Law

17  Boyle`s Law: when pressure decreases, volume increases  Charles`s Law: when pressure increases so does volume.

18 First you collect data and then you graph it. After gathering info you record temperature and data Origin: a line that passes through all cero points Vary Inversely: when a graph of two variables forms a kind of curve. Y axis= Volume X axis =Temperature Temperature (K)Volume (mL)


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