Unit 8 Flashcards
(40 cards)
Solids have __________ and __________.
definite form and volume
Liquids have a definite ______.
volume
What are the 5 properties of gases?
low density, compressibility, expansion, fluidity, diffusion and effusion
the gas form of a molecule, element, or compound is less dense than the _____ or ______ form of that same substance. The particles are _______ ______ which causes them to be less dense.
solid or liquid; further apart
Since gas particles are so far apart, they have the ability to be ____________________.
compressed into a very small space.
Gases , since they have no definite shape, can ______ when released from a closed container or heated.
expand
Gases have the ability to _____ in, out, and around solids and liquids.
flow
the normal, everyday mixing of gases
diffusion
the rapid escape of a gas from a closed container, as in the case of an aerosol can. Once in the open they then diffuse.
effusion
Gases consist of ______________ that are spread very far apart.
large numbers of very small particles
Collisions between gas particles are considered to be _______, that is, they hit another gas particle, bounce off, and hit another one and the cycle repeats itself. Energy is not ____.
elastic; lost
Gases are in _______, ______, and _______ motion and therefore possess _______ energy.
constant, rapid, and random; kinetic
There are no forces of ________ or ________ between gases.
attraction or repulsion
The average kinetic energy of a gas is dependent of its _________.
temperature
An increase in temperature will increase _______ ______ of the gas molecule.
kinetic energy
An ideal gas _________ perfectly to the ________ ________ _______.
conforms; Kinetic Molecular Theory
A real gas will ________ from the Kinetic Molecular Theory when certain conditions are present.
deviate
Real gases do have some ______ ______ at very ____ pressures.
attractive forces; high
When the temperature is very ___, there will be attraction/repulsion between these particles. (real gases)
low
Pressure is _____ __ ____ ____ on a space.
force per unit area
Pressure is currently measured with a _________.
barometer
Who invented the barometer?
Evangelista Torricelli
The barometer is a column of _____-filled glass that measures exactly ___ mm at 1 atmosphere.
mercury; 760
When weather is “fair”, the barometric pressure is said to be “____”, referring to the height of the mercury in the glass tube.
high
