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WorksheetsFinal review
Total questions: 16
Worksheet time: 8mins
A balloon is filled with 3.50 L of water at 24.0 degrees C and 2.27 atm. The balloon in the figure is placed outside on a hot day, what is the volume of the balloon ( assuming constant pressure)?
3.38 L
8.19 L
2.47 L
3.61 L
The value of the equilibrium constant for the following reaction is 345.
A+2B=3C +D
what is the value of the equilibrium constant for the reaction below
2A+4B=6C+2D
K=2 x (345)^2=2.38 x 10^5
K=(345)^1/2=18.6
K=(345)^2=1.19 x 10^5
K=(2 x 345)^2=4.76 x 10^5
Which is defined as the combination of pressure and temperature at which all three states of matter can coexist at equilibrium
Triple point
Critical point
Melting point
Deposition point
If the volume of a confined gas is doubled at constant temperature, what change is observed
The density of the gas is doubled
The pressure of the gas is increased to twice its original value
The pressure of the gas is decreased 1/4 of its original value
The pressure of the gas is decreased to 1/2 of its original value
Which of the following may affect the value of the rate constant for a chemical reaction
- the presence of a catalyst
- the concentrations of the reaction
- the temperature of the reactions
2 only
1,2, and 3
1 and 3
1 only
all of the following are properties of gases according to the kinetic theory EXCEPT
Attractive forces cause gas molecules to collide
Gases consist of mostly empty space
Gas pressure is caused by collisions of molecules with the container walls
Gas molecules are in constant motion
The equilibrium constant for a gas phase reaction is measured at two temperatures. At 100 degrees C, the equilibrium constant at 36. At 200 degrees C , the equilibrium constant is 147. Which of the following statements is correct for this equilibrium.
The reaction must be first-order
One or the products must be solid
The reaction is endothermic
A catalyst must be present
At 108 degrees C, the pressure in a 10.0 L flask is 874 mm Hg. How many moles of gas are in the flask
0.368 mol
1.30 mol
348 mol
0.873 mol
Which is NOT an assumption of matter made by the kinetic molecular theory of gases?
Gas particles are small and take up little volume relative to the volume of the space around the
When particles collide, their total energy is decreased
Gas particles are widely dispersed and therefore are not affected significantly by attractive or repulsive forces
The kinetic energy of particles is determined by their mass and their velocity
If the value of Q is less than K then
A catalyst is necessary to achieve equilibrium
The reaction will proceed to the right until equilibrium is established
The reaction will proceed to the left until equilibrium is established
The reaction will to left or right depending upon the reaction stoichiometry
What phase transition would not be observed as the temperature of a pure substance is increased under constant pressure
Solid -> liquid
Liquid -> gas
Solid -> gas
Liquid-> solid
The lid is tightly sealed on an empty 2.0 L soda bottle at 27.0 degrees C and 748 mm Hg. If the bottle is heated to 100 degrees C, what is the pressure inside the bottle
63 mm Hg
620 mmHg
1300 mmHg
930 mmHg
A balloon is filled with oxygen gas to a volume of 1.75 L at 36 degrees C. The balloon is then heated to 72 degrees C. What is the volume of the heated balloon
1.95 L
1.57 L
0.875 L
4.11 L
A large equilibrium constant
Indicates the a reaction has a small rate constant
Results from the addition of a catalyst to a reaction mixture
Indicates that the reaction favors the formation of reactants
Indicates that the reaction favors the formation of products
The effect of a catalyst on a chemical reaction is to
Increase the activation barrier for the forward reaction
Increase the energy of the products
Enable an alternate path for the reaction that has a lower activation barrier
Increase the frequency of collisions between reactants and products
The following system is at equilibrium
NH4CL(S)=NH3(G)+HCL(G)
which of the following changes will cause the reaction to move to the right
Adding NH3(G)
removing NH4CL(S)
adding HCL (G)
Removing NH3 (G)
