1.09 Behaviour of gases Flashcards
(26 cards)
gas has mass but no
shape and volume
gas consists of mostly
empty space
how do the molecules move averagely
rapidly and colide
avagrados law
equal volumes of all gases, at the same temperature and pressure, have the same number of molecules.
When volume-pressure-temperature changes, what does not change?
mass- Number of particles-molecules
Gases exert pressure by..
air molecules colliding with walls of inner surface and exert force
pressure metric system unit
Pa-Pascal
1000 kilo pascal is how many pascal
1
conversion of pressure:
Atmosphere atm : 1
mm of mercury/mm Hg :
Torr :
Pounds per square inch :
Pascal :
KiloPascal :
What’s the method?
Atmosphere atm : 1
mm of mercury/mm Hg : 760
Torr : 760
Pounds per square inch :14.7
Pascal : 1000,000
KiloPascal : 101.3
given amount * converting conversion number/ given conversion number
Gases are compressible True or False
True
diffusion
give example, explain
you cut an onion on one side of a room and then go to the other and it smells why?
the molecules that make up the odor move through the air from higher concentration into the lower concentration
Boyles law molecules
Pressure is also affected by the volume of the container. If the volume of a container is decreased, the gas molecules have less space in which to move around. As a result, they will strike the walls of the container more often and the pressure increases. As you increase pressure on the balloon surface the air inside also increases and volume is lessened
is Boyles law directly proportional or inversely proportional why?
inversely proportional as pressure increases volume decreases and vice versa
barometer
a device that used a column of mercury to measure the pressure that exerts on all things around us
what is constant in Boyles law
Temperature and gas molecules
Boyles law formula
P1 * V1 = P2 * V2
Jaques Charles
volume and temperature relation
is Charles’s law directly proportional or inversely proportional why?
directly proportional, as temperature increases volume increases
Charles law molecules
gas molecules move because they have internal energy heating receiving more energy and move faster and collision and the space between them expands and so does the volume
Charles law formula
V1 / T1 = V2/ T1
Gay Lussacs law
relation between the tempreture and pressure
What constant in Charles’s law
Temperature and amount of molecules in gas
What constant in Gays law
Volume and amount of molecules in gas
Molecules in Gay lussacs law
As Temperature increases pressure increases
As the can heat up, it may explode. The kinetic-molecular theory explains why. The kinetic energy causes the air molecules to move faster and they impact the container walls more frequently and with more force. The increase in pressure inside may eventually exceed the strength of the can and it will explode. An additional factor is that the soup may begin boiling which will then aid even more gas and more pressure to the inside of the can. The kinetic energy of the gas molecules increases, so collisions with the walls of the container are now more forceful than they were before. As a result, the pressure of the gas doubles. Decreasing the temperature would have the opposite effect, and the pressure of an enclosed gas would decrease.
