Ch. 13 States if Matter

the energy an object has because of its motion.

all matter consists of tiny particels that are in constant motion.

a force excerted by a gas per unit SA of an object.

the collisions of of atoms and molecules in the air with objects.

divice that is used to measure atmosphereic pressure.

kPa or pressure is excerted on the mercury in the tube. when the pressure is higher it goes up the tube when the pressure is lower then the mercury goes down the tube.

SI unit of pressure.

the pressure required to support 760mm of mercury in a mercury barometer at 25 degrees C.

the change from a liquid to a gas or vapor. occurs quickly.

occurs at the suface when it is not boiling

a messure of the force excerted by a gas abovee a liquid.

the temp. at which the vapor pressure of the liquid is just equal to the external pressure on the liquid

the point at where a solid becomes a liquid.

the smalles group of particals within a crystal that remains the geometric shape of the crystal.

two or more different mollecular forms of the same element in the same physical shape.

lacks an ordered internal structure

solid to a vapor without changing into a liquid

the only set of conditions at which all three phases can excist in equilibrium together.