States of MatterStates of Matter

Liquids and Gases4.2

Liquids and Gases4.2

I. Matter in the Liquid StateA. Molecules don’t lose their energy

when they collideB. They can continue to collide with the

same kinetic energy forever, as long as the temperature remains constant

C. Solids - attractive forces keep particles together

D. Liquid - attractive forces keep them close, but not in a fixed position.

I. Matter in the Liquid StateA. Molecules don’t lose their energy

when they collideB. They can continue to collide with the

same kinetic energy forever, as long as the temperature remains constant

C. Solids - attractive forces keep particles together

D. Liquid - attractive forces keep them close, but not in a fixed position.

E. Gravity causes liquid to flow and it takes the shape of the container

F. Forces between moleculesa. Cohesive forces between water molecules

create surface tensionb. Surface tension can support small objects

II. How does a liquid become a gas?A. Boiling point - point at which a liquid

becomes a gasB. Boiling can be called Vaporization

E. Gravity causes liquid to flow and it takes the shape of the container

F. Forces between moleculesa. Cohesive forces between water molecules

create surface tensionb. Surface tension can support small objects

II. How does a liquid become a gas?A. Boiling point - point at which a liquid

becomes a gasB. Boiling can be called Vaporization

C. Heat of Vaporizationa. Temperature remains the same at the

boiling pointb. Heat of vaporization - the amount of

energy require to change 1kg of a liquid to a gas

D. Evaporationa. Temperature remains constant, but

that is the average of the kinetic energy of the molecules.

b. Individual molecules move fast enough to break the attractive forces

C. Heat of Vaporizationa. Temperature remains the same at the

boiling pointb. Heat of vaporization - the amount of

energy require to change 1kg of a liquid to a gas

D. Evaporationa. Temperature remains constant, but

that is the average of the kinetic energy of the molecules.

b. Individual molecules move fast enough to break the attractive forces

c. These can escape the surface of the liquid

d. Evaporation - process by which individual particles escape the surface of a liquid that is not boiling and form a gas.

E. Cooling by Evaporationa. Molecules that remain after

evaporation are slower and coolerb. This process cools the liquid and

anything the liquid touches

c. These can escape the surface of the liquid

d. Evaporation - process by which individual particles escape the surface of a liquid that is not boiling and form a gas.

E. Cooling by Evaporationa. Molecules that remain after

evaporation are slower and coolerb. This process cools the liquid and

anything the liquid touches

III. Matter in the Gaseous StateA. Molecules completely escape the

attractive forcesB. The molecules are far apart from

one another, lots of empty spaceC. Gas completely fills any container

that you put it in

III. Matter in the Gaseous StateA. Molecules completely escape the

attractive forcesB. The molecules are far apart from

one another, lots of empty spaceC. Gas completely fills any container

that you put it in

D. Condensationa. As gas cools, particles slow downb. When they are slow enough, attractive

forces bring them together, and drops of liquid form.

c. Condensation - process where particles in gas slow down and drops of liquid are formed.

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D. Condensationa. As gas cools, particles slow downb. When they are slow enough, attractive

forces bring them together, and drops of liquid form.

c. Condensation - process where particles in gas slow down and drops of liquid are formed.

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