1 Chemistry Chapter 13 Test Review
Appropriate unit of measurement
# of moles (mol) volume (Liters/ or cubic meters) pressure (atm/ or Pa) temperature (Kelvin)
What are the standard conditions of temperature and pressure?
0 degrees Celsius and 1 atm pressure
Standard temperature
0 degress celsius
If the pressure of 2L of a gas at STP doubles, its new volume would be
1 Liter
As a gas is compressed in a cylinder...
1) the distance between gas molecules increased 2) the number of gas molecules remains the same 3) its volume decreased 4) its pressure increased 5) its density increased 6) its mass remains the same
Standard pressure is equal to
101 kPa
One mole of oxygen at 760mmHg and 0 degrees Celsius occupies a volume of
22.4 Liters
If the Kelvin Temperature of 2 L of a gas at STP doubles, the new volume would be ..
4 L
Which letter in the ideal gas equation represents the gas constant?
Constand Gas- R atm-L= 0.08206 Pa-m^3= 8.314
The number of moles of a gas is...
DIRECTLY proportional to its volume atm STP
The characteristics(variables) of gases needed to describe a gas completely include all of the following except...
Density
If the temperature and pressure of equal volumes of gases are kept constant, the number of particles of each gas are....
Equal
Avogadro's Law
Equal volumes of gases contain equal numbers of particles
Two simplifying, but false, assumptions of the ideal gas law are that gas particles exert no attractive forces upon one another and gas particles...
Have elastic collisions Are separated by large distances Are in constant random motion
How did Jacques Charles know about the behavior of gases at very low temperatures when he could not experiment with temperatures below freezing?
He extrapolated backwards to zero volume from the data on his temperature volume graph to find near absolute zero temperature.
Which of the following gases would you expect to have the greatest lifting power?
Hydrogen
Why did Boyle use J-shaped tube instead of a straight tube to demonstrate the pressure volume relationship of air?
If he used a straight tube, the mercury would have gone to the bottom and no air would have been trapped.
The molar volume of a gas...
Is dependent upon the temperature and pressure of the gas
The density of a sample of a gas is inversely related to...
Its Temperature & its volume
The ideal gas equation will only give correct values if the temperature is expressed in...
Kelvin
The temperature scale that has absolute zero as its zero point is the...
Kelvin Scale
Real gases behave like ideal gases except at very
LOW temperatures
The First step in building a model for gases should be to...
List the important behaviors of all gases
As more gas particles are added to a container, there are..
MORE collisions because the particles don't go as far.
The ideal gas equation describes the behavior of gases as though there were never any attraction between gas molecules. Explain why this does not hold true for real gas.
Not for a real gas because there is a lower limit to which molecules can be compressed due to their actual volume.
Raising the temperature of a gas in a fixed volume container will most likely change the...
Pressure exerted by the gas in the container
oxygen is diatomic, and, under similar conditions, its volume is
SAME AS that of monatomic helium
R, the gas constant in the ideal gas equation, has a numerical value of 0.0821... What are the units?
atm-liter/mol-K
The gas constant, R, is equal to 0.0821 when the pressure is expressed in
atmosphere
Boyle's Law
The pressure of a gas is inversely proportional to its volume
Dalton's Law
The sum of the partial pressures of gases in a mixture is equal to the total pressure of the mixture.
Charles law
The volume of a gas is directly proportional to its temperature
absolute zero
is 0 kelvin
The volume of 1 mole of any gas at STP
is 22.4 L
The Ideal gas law describes the behavior of real gases under...
most ordinary conditions of temperature and pressure
Gases of all types are observed to have similar...
physical properties and behavior
Ideal gas equations
pressure | Temp | #of moles | R | Volume 1.02atm | 300K | 0.81 moles | 0.0821 | 20.L 762mmHg | 272K | 2.16moles | 0.0821 | 8.3L 101 kPa | 0 dcelsius | 1 mole | 8.814 | 22.4L 1.4 atm | 20 Celsius | .38 moles | 0.0821 | 6.76L`
At a constant temperature, the pressure exerted by one mole of a gas DECREASED if the volume available is increased
true
Real gases behave like ideal gases except at very HIGH temperatures
true
although air is a mixture of gases, it behaves like a single gas
true
