Liquids Flashcards

1
Q

What is Fluidity?

A

Fluidity is the flow and diffusion of liquids.

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2
Q

What is Viscosity?

A

Viscosity is the measure of the resistance of a liquid to flow.

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3
Q

What are the Trends of Viscosity?

A

It is higher for liquids than for gases. It is higher for bigger molecules. Viscosity decreases with increases in temperature.

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4
Q

What are some Characteristics of Liquids?

A

Liquids have Surface Tension, Cohesion exists between like molecules, Adhesion Exists between different molecules, and there is capillary action.

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5
Q

What are the Physical Properties of Liquids?

A

Surface tension - molecules at the surface boundary of a liquid experience an unbalanced attractive force toward the interior of the liquid. There is net pull inward and a smaller surface area.

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6
Q

What are the Properties of the Condensation of Gases to Liquids?

A

Gases condense to liquids as they are cooled or as the pressure increases. An ideal gas would have not attractive forces. A real gas has attractive forces.

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7
Q

What is the Boiling Point of a Substance?

A

The point at which a substance will enter a gaseous state.

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8
Q

What is the Melting Point of a Substance?

A

The temperature point at which a substance will enter a liquid state.

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9
Q

What is Vapor pressure?

A

Vapor pressure is A measure of the pressure exerted by a vapor that is in equilibrium with its liquid or solid.

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10
Q

What happens at Vapor pressure equilibrium?

A

There will be an equal proportion of molecules leaving the liquid and molecules reentering the liquid.

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11
Q

How does Vapor pressure relate to Boiling Point?

A

The higher the Vapor pressure of something is, the lower the Boiling Point is.

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12
Q

What is Boiling?

A

Boiling is an instance when the vapor pressure is equal to the external pressure (the energy is high enough to resist the external pressure).

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13
Q

Why do substances with high vapor pressure “escape” easily?

A

Substances with high vapor pressure are much more willing to escape to low(er) air pressure.

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14
Q

What is the Heat of vaporization?

A

The Heat of vaporization is the heat needed to vaporize a liquid.

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