Liquids Flashcards
What is Fluidity?
Fluidity is the flow and diffusion of liquids.
What is Viscosity?
Viscosity is the measure of the resistance of a liquid to flow.
What are the Trends of Viscosity?
It is higher for liquids than for gases. It is higher for bigger molecules. Viscosity decreases with increases in temperature.
What are some Characteristics of Liquids?
Liquids have Surface Tension, Cohesion exists between like molecules, Adhesion Exists between different molecules, and there is capillary action.
What are the Physical Properties of Liquids?
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.
What are the Properties of the Condensation of Gases to Liquids?
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.
What is the Boiling Point of a Substance?
The point at which a substance will enter a gaseous state.
What is the Melting Point of a Substance?
The temperature point at which a substance will enter a liquid state.
What is Vapor pressure?
Vapor pressure is A measure of the pressure exerted by a vapor that is in equilibrium with its liquid or solid.
What happens at Vapor pressure equilibrium?
There will be an equal proportion of molecules leaving the liquid and molecules reentering the liquid.
How does Vapor pressure relate to Boiling Point?
The higher the Vapor pressure of something is, the lower the Boiling Point is.
What is Boiling?
Boiling is an instance when the vapor pressure is equal to the external pressure (the energy is high enough to resist the external pressure).
Why do substances with high vapor pressure “escape” easily?
Substances with high vapor pressure are much more willing to escape to low(er) air pressure.
What is the Heat of vaporization?
The Heat of vaporization is the heat needed to vaporize a liquid.
