Chemistry for Today: General, Organic, and Biochemistry
9th Edition
ISBN: 9781305960060
Author: Spencer L. Seager, Michael R. Slabaugh, Maren S. Hansen
Publisher: Cengage Learning
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Textbook Question
Chapter 8, Problem 8.73E
A reaction takes place between an acid and
a. The powdered magnesium reacts faster because the activation energy has been lowered.
b. The magnesium strip reacts faster because it has a higher concentration of magnesium.
c. The powdered magnesium reacts faster because it has a greater surface area.
d. The magnesium strip reacts faster because it will create a higher temperature once the reaction starts.
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4. The rate of a chemical reaction may be defined as
a.the time it takes for the reaction to be completed
b. the change in concentration of any one of the reactants.only
c. the change in concentration of any one of the reactants or
products
d. the change in concentration of any one of the products only
5. Which one of the following does a catalyst affect in a chemical
reaction?
a. The amount of heat liberated or absorbed during the reaction.
b. The amount of product(s) formed.
c. The amount of reactants needed for the reaction to take place.
d. The speed of the reaction.
Which would likely increase the rate of a chemical reaction?
A. Cooling the reaction mixture.
B. Decreasing the concentration of the reactants.
C. Decreasing the surface area of the reactants.
D. Adding a catalyst to the reaction mixture.
The Haber process is one of the most important modern industrial chemical reactions. It produces
ammonia from nitrogen gas and hydrogen gas using an iron or aluminum oxide catalyst. Because the
reaction needs to happen under intense heat and pressure, it is an expensive process. Two scientists are
arguing about the process. Scientist A argues that finding a more effective catalyst will bring down the cost
of the process, because less energy will be required for the reaction. Scientist B argues that while a catalyst
will speed up the reaction, it won't save any energy or cost, because a catalyst does not change the enthalpy
of the reaction. Explain in 3 sentences or less which scientist is correct, and why.
Chapter 8 Solutions
Chemistry for Today: General, Organic, and Biochemistry
Ch. 8 - Classify the following processes as spontaneous or...Ch. 8 - Classify the following processes as spontaneous or...Ch. 8 - Classify the following processes as exergonic or...Ch. 8 - Classify the following processes as exergonic or...Ch. 8 - Describe the energy and entropy changes that occur...Ch. 8 - Describe the energy and entropy changes that occur...Ch. 8 - Pick the example with the highest entropy from...Ch. 8 - Pick the example with the highest entropy from...Ch. 8 - You probably know that on exposure to air silver...Ch. 8 - Classify the following processes according to...
Ch. 8 - Classify the following processes according to...Ch. 8 - Describe the observations or measurements that...Ch. 8 - Prob. 8.13ECh. 8 - Consider the following hypothetical reaction: A+BC...Ch. 8 - Consider the following hypothetical reaction: A+BC...Ch. 8 - A reaction generates chlorine gas (Cl2) as a...Ch. 8 - A reaction generates hydrogen gas (H2) as a...Ch. 8 - Prob. 8.18ECh. 8 - Prob. 8.19ECh. 8 - In each of the following, which reaction mechanism...Ch. 8 - Which reaction mechanism assumptions are...Ch. 8 - Prob. 8.22ECh. 8 - Sketch energy diagrams to represent each of the...Ch. 8 - Prob. 8.24ECh. 8 - Use energy diagrams to compare catalyzed and...Ch. 8 - Prob. 8.26ECh. 8 - The following reactions are proposed. Make a rough...Ch. 8 - Prob. 8.28ECh. 8 - Prob. 8.29ECh. 8 - Suppose you are running a reaction and you want to...Ch. 8 - A reaction is started by mixing reactants. As time...Ch. 8 - A reaction is run at 10C and takes 3.7hours to go...Ch. 8 - What factor is more important than simply the...Ch. 8 - Prob. 8.34ECh. 8 - Describe the establishment of equilibrium in a...Ch. 8 - Prob. 8.36ECh. 8 - Prob. 8.37ECh. 8 - Colorless hydrogen gas (H2) and red-brown colored...Ch. 8 - Colorless N2O4 gas decomposes to form red-brown...Ch. 8 - Prob. 8.40ECh. 8 - Write an equilibrium expression for each of the...Ch. 8 - Prob. 8.42ECh. 8 - Prob. 8.43ECh. 8 - Prob. 8.44ECh. 8 - Prob. 8.45ECh. 8 - A sample of gaseous BrCl is allowed to decompose...Ch. 8 - At 600C, gaseous CO and Cl2 are mixed together in...Ch. 8 - A mixture of the gases NOCl, Cl2 and NO is allowed...Ch. 8 - Consider the following equilibrium constants....Ch. 8 - Prob. 8.50ECh. 8 - Use Le Chteliers principle to predict the...Ch. 8 - Use Le Chteliers principle to predict the...Ch. 8 - Use Le Chteliers principle to predict the...Ch. 8 - Prob. 8.54ECh. 8 - Tell what will happen to each equilibrium...Ch. 8 - Tell what will happen to each equilibrium...Ch. 8 - The gaseous reaction 2HBr(g)H2(g)+Br2(g) is...Ch. 8 - Prob. 8.58ECh. 8 - Prob. 8.59ECh. 8 - Prob. 8.60ECh. 8 - Prob. 8.61ECh. 8 - Prob. 8.62ECh. 8 - Prob. 8.63ECh. 8 - Prob. 8.64ECh. 8 - Prob. 8.65ECh. 8 - Prob. 8.66ECh. 8 - Refer to Figure 8.10 and answer the questions....Ch. 8 - Refer to Figure 8.13 and answer the questions....Ch. 8 - Prob. 8.69ECh. 8 - Prob. 8.70ECh. 8 - Suppose you have two identical unopened bottles of...Ch. 8 - Someone once suggested that it is impossible to...Ch. 8 - A reaction takes place between an acid and...Ch. 8 - If the reaction:A+BC+D is designated as first...Ch. 8 - Prob. 8.75ECh. 8 - A book is held 6 feet above the floor and then...Ch. 8 - Prob. 8.77ECh. 8 - Prob. 8.78ECh. 8 - Prob. 8.79ECh. 8 - Prob. 8.80ECh. 8 - Prob. 8.81ECh. 8 - Which of the following is the best example of...Ch. 8 - Which is NOT an example of an endothermic change?...Ch. 8 - Which of the following processes is endothermic?...Ch. 8 - Which sentence best describes the following...Ch. 8 - By which of the following mechanisms does a...Ch. 8 - Which of the following is NOT true of reversible...Ch. 8 - Given the reaction: 2CO(g)+O2(g)2CO2(g) When there...Ch. 8 - Prob. 8.89ECh. 8 - Consider the reaction N2(g)+3H2(g)2NH3(g)+heat....Ch. 8 - Prob. 8.91ECh. 8 - Prob. 8.92ECh. 8 - For the reaction: H2(g)+Br2(g)2HBr(g), the...Ch. 8 - Prob. 8.94E
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