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Flashcards in Molecular Structure Of Liquids Deck (22)
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1

Describe the molecular structure of liquids

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2

Describe the term fluidity

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3

Describe the quasicrystalline structure of liquids

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4

What is the relaxation time of the quasicrystalline structure of liquids?

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5

How can you describe ordinary liquids?

•Isotropic

•Amorphous

6

Describe van der vaals forces

7

What is the radius of action?

•Smallest distance between two molecules at which the van der vaal forces become small enough to be neglected

8

What is the sphere of molecular action

•A sphere centred at the molecule and with a radius equal to the radius of action of that molecule

9

Describe intermolecular forces

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10

What is cohesion pressure?

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11

Describe the energy of molecules

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12

Describe surface tension

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13

Describe the coefficient of surface tension

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14

What does the coefficient of surface tension depend on?

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15

Describe wetting

•The curving of the free surface of a liquid at the boundary line between a liquid, gas and a solid

•Caused by different coefficients of surface tension of the three media -At points along the boundary line- the net surface tension force must be zero- this is possible if the free surface of the liquid is curved

•A relative property - liquid may wet a solid body and not wet another solid body

16

Describe the contact angle

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17

Give examples of wetting

•Water wets glass and does not wet paraffin wax

•Mercury does not wet glass and wets steel

18

What is meniscus?

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19

Describe Laplace pressure

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20

Describe capillary action

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21

Describe gas embolisms

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22

Give examples of gas embolisms

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