EDUC109 Study Guide - Final Guide: Close-Packing Of Equal Spheres

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plumelephant984

31 May 2018

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Chemistry

-A front is a boundary between two air masses

-Everything is made of tiny pieces called atoms

-Matter=Anything that occupies space and has mass

-Atoms join together to form molecules.

Solids

-Particles are packed close together and are fixed in position, although they vibrate.

-The close packing of the particles result in solids being incompressible.

-The inability of the particles to move around results in solids retaining their shape

and volume when placed in a new container and prevents the particles from flowing.

Liquids

-Particles are closely packed, but they have some ability to move around.

-The close packing results in liquids being incompressible.

-The ability of the particles to move allows liquids to take the shape of their container

and to flow. However, they don’t have enough freedom to escape and do not expand to fill

the container.

Gases

-Particles have complete freedom from each other.

-The particles are constantly flying around, bumping into each other and the container.

-There is a lot of empty space between the particles

-Because there is a lot of empty space, the particles can be squeezed closer together.

Therefore, gases are compressible.

-Because the particles are not held in close contact and are moving freely, gases expand to

fill and take the shape of their container, and will flow.

State

Shape

Volume

Compress

Flow

Solid

Fixed

Liquid

Indefinite

Fixed

Yes

Gas

Indefinite

Yes

Fixed=Property doesn't change when placed in a

container.

Indefinite=Takes the property of the container.

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Document Summary

A front is a boundary between two air masses. Everything is made of tiny pieces called atoms. Matter= anything that occupies space and has mass. Particles are packed close together and are fixed in position, although they vibrate. The close packing of the particles result in solids being incompressible. The inability of the particles to move around results in solids retaining their shape and volume when placed in a new container and prevents the particles from flowing. Particles are closely packed, but they have some ability to move around. The close packing results in liquids being incompressible. The ability of the particles to move allows liquids to take the shape of their container and to flow. However, they don t have enough freedom to escape and do not expand to fill the container. Particles have complete freedom from each other. The particles are constantly flying around, bumping into each other and the container.

Related Questions

How do solids, liquids, and gases differ?

a. in solid matter, atoms or molecules pack dose to each other in fixed locations; in gases, atoms or molecules pack about as closely as they do in solid matter, but they are free to move; in liquid matter, atoms or molecules have a lot of space between them and are free to move

b. in solid matter, atoms or molecu es pack dose to each other but, they are free to move; in liquid matter, atoms or molecules pack about as closely as they do in solid matter, they are also free to move; in gaseous matter, atoms or molecules have a lot of space between them and are free to move relative to one another

c. a solid has a fixed volume and rigid shape; gases assume the shape of their container; liquids always assume the shape and volume of their container

d. a solid has a fixed volume and rigid shape; liquids assume the shape of their container; gases always assume the shape and volume of their container

salmongoat119

64. Which of these statements about fatty acids are false? A. The physical state of a triglyceride with three unsaturated fatty acid tails would be a clear liquid. B. Complex lipids that contain mainly unsaturated fatty acids are liquids (oils) at room temperature C. Its best to use fats with high melting points in our diet. D. A disadvantage of the ability of saturated fats to pack tightly is that tightly packed, saturated fats clog arteries as atherosclerosis 65. Trans fatty acids A. are formed when vegetable oil is hydrogenated (for solidification). B. are found in fried foods C. have an atypical shape that affects their chemical activity D. are not flexible and can adhere to surfaces E. should be avoided because they are composed of partially hydrogenated (partially hardened) oils F. are all of the above 66 Which of these statements about fatty acids are false? A. When plants and animals build fatty acids they make the trans forms. B. Food manufacturers found that foods like chips with the trans form have a longer "shelf life" C Natural cis fatty acids tend to turn rancid and spoil D Although natural cis fatty acids turn rancid and spoil, it is the cis form that is used by the body. E.The process of hydrogenation, in which hydrogens are added to unsaturated fats, produces a mixture of saturated fatty acids and standard and trans forms of unsaturated fatty acids 67. Good tips for reducing dietary fats are to A. use non-fat or low-fat dairy products and other products B use low-fat cooking methods C bake, roast, steam, broil, stir fry, microwave D. seldom have fried foods E choose lean cuts of meat, trim fat F. do all the above 68. Which of these statements about the properties of fatty acids are true? A. Melting point of all fatty acids increases with increasing hydrocarbon chain length (i.e increasing size) B cis double bonds prevent good alignment of molecules in unsaturated fatty acids leading to C Melting point of unsaturated fatty acid are lower than that of a saturated fatty acid with the D. The melting point of a saturated fatty acid is greater than that of an unsaturated fatty acid of poor packing same number of carbon atoms due to the presence of their double bonds the same chain length, because saturated fatty acid chains tend to be fully extended and to stack in a regular structure, thereby causing increased intermolecular attraction. E. all of the above 69. Freebie 70 Freebie

EDUC109 Study Guide - Final Guide: Close-Packing Of Equal Spheres

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