phases of matter Flashcards
1
Q
kinetic theory
A
explanation of how particles in matter behave
2
Q
melting point
A
temperature at which a solid begins to liquefy
3
Q
heat of fusion
A
the amount of energy required to change a substance from the solid phase to the liquid phase at its melting point
4
Q
boiling point
A
is the temp. at which the pressure of the vapor in the liquid is equal to thee external pressure acting on the surface of the liquid.
5
Q
heat of vaporization
A
the amount of energy required for the liquid at its boiling point to become a gas
6
Q
diffusion
A
is the spreading of particles throughout a given volume until they are uniformly disturbed
7
Q
plasma
A
matter consist of positively and negatively charged particles
8
Q
thermal expansion
A
increase of size of substance when the temp is increased
