Question 1 of 21
saplin;!iearning
Which of the following is a postulate of the kinetic molecular theory of gases?
o
o
o
o
The average kinetic energy of the gas particles is inversely
proportional to the square of the absolute temperature of the gas.
The average kinetic energy of the gas particles is directly
proportional to the square of the absolute temperature of the gas.
The average kinetic energy of the gas particles is directly
proportional to the absolute temperature of the gas.
The average kinetic energy of the gas particles is inversely
proportional to the absolute temperature of the gas.
Question 2 of 21
saplin~arning
Which of the following is a postulate of the kinetic molecular theory of gases?
o
o
o
The pressure exerted by the gas is due to the gas particles
colliding with the container walls.
The pressure exerted by the gas is due to the gas particles
sticking to the container walls.
The pressure exerted by the gas is due to repulsions
between the gas particles.
Question 3 of 21
saplin;!iearning
Perform the following conversions:
Number
441.7 mmHg to atm
10
atm
Number
0.898 atm to Torr
10
Torr
Number
942.7 kPa to atm
10
atm
Number
1193.6 mmHg to Pa
10
Pa
Question 4 of 21
saplin#.arning
For a fixed amount of gas at a fixed temperature, what will happen if the volume is doubled?
o
o
o
o
The pressure exerted by the gas will quadruple.
The pressure exerted by the gas will halve.
The pressure exerted by the gas will double.
The pressure exerted by the gas will remain unchanged.
Question 5 of 21
saplin#.arning
Which of the following statements correctly describes the relationship between volume (V) and
temperature (1) illustrated in the following plot for a gas at constant pressure?
o
o
o
The volume of a fixed amount of gas is inversely
proportional to its absolute temperature .
The volume of a fixed amount of gas is directly
proportional to the inverse of its absolute
temperature (1/1).
The volume of a fixed amount of gas is directly
proportional to its absolute temperature .
V
!/
V-
V (L)
I""
T(K)
Question 6 of 21
saplin#.arning
A 139.5 mL sample of carbon dioxide was heated to 345 K. If the volume of the carbon dioxide sample
at 345 K is 388.8 mL , what was its temperature at 139.5 mL?
Number
10
K
Question 7 of 21
saplin~arning
For a fixed amount of gas at a fixed volume, what will happen if the absolute temperature is doubled?
o
o
o
o
The pressure exerted by the gas will double.
The pressure exerted by the gas will halve.
The pressure exerted by the gas will remain unchanged.
The pressure exerted by the gas will quadruple.
Question 8 of 21
saplin#.arning
A sample of an ideal gas has a volume of 2.25 L at 284 K and 1.05 atm. Calculate the pressure when the
volume is 1.65 L and the temperature is 305 K.
Number
10
atm
Question 9 of 21
saplin~aming
For a fixed volume of gas at a fixed temperature, what will happen if the amount (number of moles) is doubled?
o
o
o
o
The pressure exerted by the gas will remain unchanged.
The pressure exerted by the gas will halve.
The pressure exerted by the gas will double.
The pressure exerted by the gas will quadruple.
Question 10 of 21
saplin#.arning
A gas-filled weather balloon has a volume of 52.0 L at ground level , where the pressure is 767 mmHg and
the temperature is 23.6 "C. After being released, the balloon rises to an altitude where the temperature is
-2.31 "C and the pressure is 0.0633 atm. What is the weather balloon's volume at the higher altitude?
Number
10
L
Question 11 of 21
saplin~aming
What pressure is exerted by 0.971 mol of N2 in a 5.15 L steel container at 180.0 "C?
Number
10
atm
Question 12 of 21
saplin#.arning
At what temperature do 0.017560 mol of Ne in a 935.5 mL container exert a pressure of 0.78 atm?
Number
10
K
Question 13 of 21
saplin;{ieaming
What volume is occupied by 0.849 mol of C02 at 296.7 K and 675 mmHg?
Number
10
L
Question 14 of 21
saplin~earning
What pressure is exerted by 987.1 g of CH4 in a 0.58 L steel container at 201.8 K?
Number
10
atm
Question 15 of 21
saplin~aming
A gaseous compound has a density of 1.35 gi L at 25.8 ' C and 1.65 atm. What is the molar mass of the
compound?
Number
Molar mass =
1
0
gl mol
L.:::======-_---1
Question 16 of 21
saplin;{iearning
Hydrogen produced from a hydrolysis reaction was collected over water and the following data was compiled.
Total volume of H2(g) collected
96.25 mL
Temperature
27.0 ' C
Banometric Pressure
744 mmHg
Vapor Pressure of water at 27.0 ' C
27.0 mmHg
Calculate the moles of hydrogen gas produced by the reaction.
Number
10
mol H,
Question 17 of 21
saplin~arning
The combustion of octane, C8H18, proceeds according to the reaction
If 337 mol of octane combusts, what volume of carbon dioxide is produced at 17.0 ' C and 0.995 atm?
Number
10
L
Question 18 of 21
saplin@eaming
A mixture of He, Ne, and Ar has a pressure of 17.1 atm at 28.0 ' C. If the partial pressure of He is 1.08 atm and
that of Ar is 3.28 atm, what is the partial pressure of Ne?
Number
10
atm
Question 19 of 21
saplin~arning
If 4.22 g of Ar are added to 1.76 atm of He in a 2.00 L cylinder at 27.0
resulting gaseous mixture?
'c, what is the total pressure of the
Number
10
p
Total
atm
Question 20 of 21
saplin~earning
If a gaseous mixture is made by combining 2.12 g of Ar and 1.93 g of Kr in an evacuated 2.50 L container at
25.0 'c, what are the partial pressures of each gas and what is the total pressure exerted by the gaseous
mixture?
Number
p
Ac
=
10
atm
Number
10
P K,
atm
Number
p
Total
=
10
atm
Question 21 of 21
saplin;{ieaming
Which of the following statements are evidence that gases do not always behave ideally?
Check all that apply.
At 4 K and 1 atm, helium is a liquid.
It is impossible to compress a gas enough so that it takes up no volume.
When two gases are mixed, they follow Dalton's law of partial pressures.
C02 gas becomes dry ice (solid C02) at 1 atm and -78.5 "C.