Ch 2 Test Flashcards
What is the definition melting point?
It occurs in crystalline solids when melting occurs at a specific temperature.
What is the definition of melting?
The change in state from a solid to a liquid. It evolves the particles moving faster.
What is the definition of freezing?
The change in state from aliquot to a solid. It involves the particles cooling any slowing down.
What is the definition of vaporization and the name of the 2 types?
The change in state from a liquid to a gas. It evolves the particles moving faster. The two types of vaporization are evaporation and boiling.
What is the definition of evaporation?
Vaporization that takes place on the surface of a liquid.
What is the definition of boiling?
What is the definition of boiling point?
Boiling is vaporization that takes place below and at the surface of a liquid. Boiling point is the temps tire at which a liquid boils.
What is the definition of condensation?
Ex.
It is the change in state from a gas to a liquid. It envolves the particles of ages slowing down.
Ex. Water on the outside of a cool container.
What is the definition of sublimation? When does this occur?
Ex.
It is the change in state from a solid to a gas. It occurs when the surface particles of a solid gain enough energy that they form into a gas.
Ex. Dry Ice
What is the definition of a solid? How are the particles arranged?
A solid has a definite shape and volume. The particles are closely packed together and can only vibrate.
What is a amorphous solid? What is a crystalline solid?
1 Ex for each solid
An amorphous solid has no arranged particles. It also has no specific melting point. An crystalline solid are solids that are made up of solids and have a regular repeating pattern. They also have a specific melting point.
Ex. Amorphous solid- rubber
Ex. Crystalline solid- salt
What is the definition of a liquid? How are its particles arranged?
A liquid has a definite volume but indefinite shape. It’s particles are closely packed together but they can slide around each other.
What is the definition of a fluid?
It means substance that flows.
What is the definition of surface tension? When does it occur?
It is the inward pull or force among the molecules in a liquid that brings the molecules on the surface closer together. It occurs when molecules attract one another and bring each other down (water).
What is the definition of viscosity?
High viscosity=
Low viscosity=
A liquids resistance to flow.
=slow honey
=fast water
What is the definition of a gas?
How are its particles arranged?
Has no definite shape and volume. It’s particles are very widespread.
