Vocab

Question 1

Melting point:

Answer 1

the temperature at which a solid begins to liquify

Question 2

Heat of Fusion

Answer 2

the amount if energy required tochange a substance from the soild phase to the liquid phase at its melting point

Question 3

Heat of Vaporization

Answer 3

the amount if energy required for the liquid at its boiling point to become a gas

Question 4

Diffusion

Answer 4

the spreading of particles throughout a given volume until thay are uniformly distributed

Question 5

Thermal Expansion

Answer 5

an increase in the size of a substance when the temperature is increased

Question 6

Boiling point

Answer 6

(of a liquid) the temperartue at which the pressure of the vapor in the liquid is equal to the extermal presssure acting on the surface of the liquid

Question 7

Liquid Crystals

Answer 7

do not change states in the usual matter

LCD, Liquid Crystal Display on watches, clocks, calculators

Question 8

Amorphous Solids

Answer 8

Amorphous solids are a type of solid that lacks definition in shape, pattern and long-range order. They are opposite to crystalline solids, which have a defined shape, pattern, and long range order. Amorphous solids do not have a well-defined melting point.