Chapter 18 Reaction Rates And Equilibrium

42 Questions  I  By Verdun on March 13, 2011
Chapter 18 REACTION RATES AND EQUILIBRIUM

  
Changes are done, please start the quiz.


Question Excerpt

Removing question excerpt is a premium feature

Upgrade and get a lot more done!
1.  How are rates of chemical change expressed?
A.
B.
C.
2.   Look at Figure 18.3 on page 542. In a typical reaction, as time passes, the amount of____________ decreases and the amount of ____________ increases.
A.
B.
C.
3.      What does collision theory say about atoms, ions, ormolecules reacting to  form products when they collide?
A.
B.
C.
4.  Particles lacking the necessary kinetic energy to react bounce apart ____________ when they collide.   
A.
B.
C.
5.  Look at Figure 18.5 on page 543. Which arrangement of atoms contains the least amount of energy?
A.
B.
C.
6.  Circle the letter of the term that completes the sentence correctly. The minimum amount of energy that particles must have in order to react is called the _______ .
A.
B.
C.
D.
7.  An activated complex is the arrangement of atoms at the ______________________ of the activation-energy barrier.
A.
B.
C.
8.  Circle the letter of the term that best describes the lifetime of an activated complex.
A.
B.
C.
D.
9.  Why is an activated complex sometimes called the transition state?
A.
B.
C.
10.  Changes in the rate of chemical reactions depend on conditions such as
A.
B.
C.
11.  The main effect of increasing the temperature of a chemical reaction is to ______________________ the number of particles that have enough kinetic energy to react when they collide.
A.
B.
C.
12.  What happens when you put more reacting particles into a fixed volume?
A.
B.
C.
13.  The smaller the particle size, the larger the surface area of a given _____________.
A.
B.
C.
14.  What are some ways to increase the surface area of solid reactants?
A.
B.
C.
15.  A ______________________ is a substance that increases the rate of a reaction without being used up itself during the reaction.
A.
B.
C.
16.  What does a catalyst do?
A.
B.
C.
17.  In a chemical equation, how do you show that catalysts are not consumed or chemically altered during a reaction?
A.
B.
C.
18.  A(n) ______________________ is a substance that interferes with the action of a catalyst.
A.
B.
C.
19.  What happens in reversible reactions?
A.
B.
C.
20.  Chemical equilibrium is a stateof balance in which the rates of forward and reverse reactions __________; no net change in the amount of reactants and products occurs in the chemical system.
A.
B.
C.
21.  The equilibrium position of a reaction is given by the relative_______________ of the system’s components at equilibrium.
A.
B.
C.
22.  At equilibrium, how many types of molecules are present in
A.
B.
C.
23.  What is Le Châtelier’s principle?
A.
B.
C.
24.  Stresses that upset the equilibrium of a chemical system include changes in _______
A.
B.
C.
25.  When you add a product to a reversible chemical reaction, the reaction is always pushed in the direction of ______________________ .
A.
B.
C.
26.  When you remove a product, the reaction is pulled in the direction of ______________________ .
A.
B.
C.
27.  ______________ the temperature of achemical reaction causes the equilibrium position of a reaction to shift in the direction that absorbs heat.
A.
B.
C.
28.  How does increasing pressure affect a chemical system?
A.
B.
C.
29.  The equilibrium constant (Keq) is the ratio of ____________________ concentrations to ____________________ concentrations at equilibrium, with each concentration raised to a power equal to the number of ____________________ of that substance in the balanced chemical equation.
A.
B.
C.
30.  What are the exponents in the equilibrium-constant expression?
A.
B.
C.
31.  What do the square brackets indicate in the equilibrium-constant expression?
A.
B.
C.
32.  The value of Keq for a reaction depend on the__________________.
A.
B.
C.
33.  A value of Keq greater than 1 means that ______________________ are favored over ______________________ .
A.
B.
C.
34.  A value of Keq less than 1 means that ______________________ are favored over ______________________ .
A.
B.
C.
35.  Free energy is energy that is available to do ______________________ .
A.
B.
C.
36.  ________processes can be made 100% efficient.
A.
B.
C.
37.              Spontaneous reactions are reactions that occur naturally and that favor the formation of ______________________ at the specified conditions.
A.
B.
C.
38.  Some reactions that are nonspontaneous at one set of conditions may be spontaneous at other conditions.
A.
B.
C.
39.  Some factor other than ______________________ change must help determine whether a physical or chemical process is spontaneous.
A.
B.
C.
40.  What is entropy?
A.
B.
C.
41.  The law of disorder states that processes move in the direction of ______________________ disorder or randomness.
A.
B.
C.
42.  Does entropy tend to increase or decrease in chemical reactions in which the total number of product molecules is greater than the total number of reactant molecules? ______________________
A.
B.
C.
Back to top


to post comments.

Removing ad is a premium feature

Upgrade and get a lot more done!
Take Another Quiz