PROPERTIES OF LIQUIDS Flashcards

1
Q

THE PROPERTY OF A LIQUID DEPENDS ON..

A

kinetic energy of particles

intermolecular forces between particles

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2
Q

What is viscocity?

A

the resistance to flow

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3
Q

effects of intermolecular forces & shape on viscosity

A

stronger forces=more viscous

viscosity increases with molecular Wieght

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4
Q

What is surface tension?

A

imbalance of forces at the top of a liquid sample J/m2

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5
Q

cohesive force vs adhesive?

A

CO-binds molecules to one another

AD-binds molecules to surface

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6
Q

When does evaporation occur?

A

when the energetic molecules near the surface of the liquid exceed intermolecular forces and transition into gas phase

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7
Q

what effects boiling point and vapour pressure?

A

the ease at which liquid goes to gas

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8
Q

what happens to molecules during evaporation in an open system? closed?

A

O-molecules evaporate and are removed

C-molecules evaporated and condense at same rate.

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9
Q

surface area is greater when

A

intermolecular forces are weaker

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10
Q

properties of volatile liquids /what they are

A

evaporate easy

high vapour pressure at room temp

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11
Q

What is a phase change

A

change in physical state with no composition change

involves in change in energy of system

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12
Q

Surface tension

A

imbalance of forces on top of a liquid sample

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13
Q

Evaporation occurs when

A

moleulcues in the liquid phase surpass intermolecular forces and go to gas phase
ease of how this happens affects the boiling and vapour pressure of the liquid

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14
Q

In an open system:

In a closed system:

A

molecules evaporate and are removed

Molecules condense and evaporate at the same rate

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15
Q

Vapour pressure depends on

A
  • ease at which evaporation occurs
  • temp is high
  • high surface area/weak intermolecular forces
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16
Q

what is vapourization?

A

molecules escape the surface of liquid into the gas phase

17
Q

Boiling occurs when

A

external pressure = internal pressure

18
Q

What is the triple point?

Critical point

A

3 phases are in equilibrium

supercritical fluid is formed

19
Q

what is supercritical fluid?

A

no phase seperation between liquid and gas