Factors Affects Of Chemical Reaction
- 1.Which three factors affect the rate of a chemical reaction?
- A.
Catalyst, Product Concentration, Container Volume
- B.
Temperature, Reactant Concentration, Pressure
- C.
Temperature, Reactant Concentration, Catalyst
- D.
Temperature, Product Concentration, Container Volume
- 2.
![In the reaction 2A + B --> 2C + D, the -[A] per time was found to be 5.0 . What is the rate of change of B? - ProProfs](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs= "In the reaction 2A + B --> 2C + D, the -[A] per time was found to be 5.0 . What is the rate of change of B?")
In the reaction 2A + B --> 2C + D, the -[A] per time was found to be 5.0 . What is the rate of change of B?- A.
25 M/min
- B.
10 M/min
- C.
2.5 M/min
- D.
5.0 M/min
- 3.
Consider the reaction which ammonia is synthesized from nitrogen and hydrogen gases: How is the rate of formation of ammonia related to the rate of consumption of hydrogen?
- A.
The rate of formation of ammonia is two thirds the rate of consumption of hydrogen
- B.
The rate of formation of ammonia is half the rate of consumption of hydrogen
- C.
The rate of formation of ammonia is equal to the rate of consumption of hydrogen
- D.
The rate of formation of ammonia is 1/5 times the rate of consumption of hydrogen
- 4.Use the information below to determine the order of the reaction with respect to the concentration of A. A + B --> P Trial [A] [B] rate 1 0.273 0.763 2.83 2 0.273 1.526 2.83 3 0.819 0.763 25.47
- A.
3
- B.
4
- C.
2
- D.
1
- 5.Activation energy is required to initiate
- A.
Endothermic reactions only.
- B.
Neither exothermic or endothermic reactions.
- C.
Both exothermic and endothermic reactions.
- D.
Exothermic reactions only.
- 6.The difference between the potential energy of the products and the potential energy of the reactants is the
- A.
Heat of fusion
- B.
Heat of reaction
- C.
Free energy
- D.
Activation energy
- 7.Which condition will increase the rate of a chemical reaction?
- A.
Increased temperature and decreased concentration of reactants
- B.
Increased temperature and increased concentration of reactants
- C.
Decreased temperature and decreased concentration of reactants
- D.
Decreased temperature and increased concentration of reactants.
- 8.Given the reaction: 2 SO2(g) + O2(g) --> 2 SO3(g) The rate of the forward reaction increases by adding more SO2 because the
- A.
Number of molecular collisions will increase
- B.
Temperature will increase
- C.
Forward reaction is endothermic
- D.
Reaction will shift to the left
- 9.The decomposition of nitrogen dioxide to nitrogen and oxygen is second-order with a rate constant k = 12.5 M-1 s-1. What is the half-life for the reaction if [NO2]0 = 0.00260 M
- A.
30.8 sec
- B.
0.0800 sec
- C.
0.0554 sec
- D.
61.5
- 10.Which of the following graphs is linear for A --> products
- A.
Ln[A] versus t if first-order in A
- B.
Ln[A] versus t if second-order in A
- C.
 versus  if second-order A
![Factors Affects Of Chemical Reaction - Quiz]()
- D.
1/[A] versus t if first-order in A
- 11.
For the reaction A --> B, the activation energy is = 125 kJ/mol and the heat of reaction, H = 50. kJ/mol. What is the for the reverse reaction in kJ/mol?
- A.
125 kJ/mol
- B.
-75 kJ/mol
- C.
75 kJ/mol
- D.
-125 kJ/mol
- 12.Which of the following will lower the activation energy for a reaction?
- A.
Adding a suitable catalyst
- B.
Increasing the concentrations of reactants
- C.
Raising the temperature of the reaction
- D.
All of these options will lower the activation energy for a reaction
- E.
There is no way to lower the activation energy of a reaction
- 13.Refer to the equation below, where two mechanisms are proposed for the reaction of nitrogen dioxide with carbon monoxide: NO2(g) + CO(g) --> CO2(g) + NO(g) Mechanism I: NO2(g) + CO(g) --> CO2(g) + NO(g) (one step) Mechanism II: NO2(g) + NO2(g) --> NO3(g) + NO(g) (slow) NO3(g) + CO(g) --> CO2(g) + NO2(g) (fast) What is the predicted rate law for Mechanism II?
- A.
Rate=k[NO2]
- B.
Rate=k[NO2][CO]
- C.
Rate=k[NO2]^2[CO]
- D.
Rate=k[NO2]^2
- 14.A catalyst works by doing what?
- A.
By increasing the kinetic energy of the molocules
- B.
By reducing the activiation energy
- C.
By increasing the activation energy
- D.
By providing a large surface area
- 15.What factors can alter the rate of a reaction?
- A.
Temperature
- B.
Molocule size
- C.
X ray absorption
- D.
Absorptivity
- 16.
What is the Delta H value for this reaction?
- A.
572 kJ mol-1
- B.
1370 kJ mol-1
- C.
-572 kJ mol -1
- D.
1942 kJ mol -1
- 17.Activation energy is required to initiate
- A.
Endothermic reactions only.
- B.
Neither exothermic or endothermic reactions.
- C.
Both exothermic and endothermic reactions.
- D.
Exothermic reactions only.
- 18.When NH4NO3 is dissolved in water, the temperature of the water decreases. When NaOH is dissolved in a separate water sample, the temperature of the water increases. Based on these observations, it can be concluded that the dissolving of
- A.
Both salts are endothermic.
- B.
Both salts are exothermic.
- C.
NH4NO3 is exothermic and the dissolving of NaOH is endothermic.
- D.
NH4NO3 is endothermic and the dissolving of NaOH is exothermic.
- 19.Given the reaction: 2 SO2(g) + O2(g) --> 2 SO3(g) The rate of the forward reaction increases by adding more SO2 because the
- A.
Number of molecular collisions will increase
- B.
Temperature will increase
- C.
Forward reaction is endothermic
- D.
Reaction will shift to the left
- 20.A collision model can only happen when two molecules collide just right?
- A.
True
- B.
False
- 21.A reaction only takes when a molecule separates?
- A.
True
- B.
False
- 22.Does the collision model only apply to when molecules collide?
- A.
Yes
- B.
No
- 23.
On this graph, which letter represents the activation energy? (hint: it isn't F)
- A.
A
- B.
B
- C.
C
- D.
D
- E.
E
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