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 8.6E
Describe the energy and entropy changes that occur in the following processes, and indicate whether the processes are spontaneous under the conditions stated:
a. On a cold day, water freezes.
b. A container of water at
c. The odor from an open bottle of perfume spreads throughout a room.
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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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- Describe the energy and entropy changes that occur in the following processes, and indicate whether the processes are spontaneous under the conditions stated: a.Lumber becomes a house b.A seed grows into a tree. c.On a hot day, water evaporates from a lake.arrow_forwardIdentify each of the processes listed as spontaneous or non-spontaneous. For each non spontaneous process, describe the corresponding spontaneous process in the opposite direction. (a) Oxygen molecules dissociate to form oxygen atoms. (b) A tray of water is placed in the sun on a warm day and freezes. (c) A solution of salt water forms a layer of acid on top of a layer of base. (d) Silver nitrate is added to a solution of sodium chloride and a precipitate forms. (e) Sulfuric acid sitting in a beaker turns into water by giving off gaseous SO3.arrow_forwardWhat is entropy? Why is entropy important?arrow_forward
- Decide whether the following processes will be spontaneous, and why. The why can be general, not specific. a Ice melting at 5C b Ice melting at +5C c KBr(s) dissolving in water d An unplugged refrigerator getting cold e A leaf falling from a tree to the ground f The reaction Li(s)+12F2(g)LiF(s) g The reaction H2O(l)H2(g)+12O2(g)arrow_forwardThermodynamics provides a way to interpret everyday occurrences. If you live in northern climates, one common experience is that during early winter, snow falls but then melts when it hits the ground. Both the formation and the melting happen spontaneously. How can thermodynamics explain both of these seemingly opposed events?arrow_forwardWhat is a spontaneous process? Give three examples of spontaneous processes. Give three examples of nonspontaneous processes.arrow_forward
- What is the change in entropy, S, for the reaction CaCO3(s)+2H(aq)Ca2+(aq)+H2O(l)+CO2(g) See Table 18.1 for values of standard entropies. Does the entropy of the chemical system increase or decrease as you expect? Explain.arrow_forwardIdentify each of the processes listed as spontaneous or nons-pontaneous. For each nonspontaneous process, describe the corresponding spontaneous process in the opposite direction. (a) A group of cheerleaders builds a human pyramid. (b) Table salt dissolves in water. (c) A cup of cold coffee in a room becomes steaming hot. (d) Water molecules in the air are converted to hydrogen and oxygen gases. (e) A person peels an orange, and you smell it from across the room.arrow_forwardWhich of the following are spontaneous processes? a A cube of sugar dissolves in a cup of hot tea. b A rusty crowbar turns shiny. c Butane from a lighter burns in air. d A clock pendulum, initially stopped, begins swinging. e Hydrogen and oxygen gases bubble out from a glass of pure water.arrow_forward
- For each pair of items, tell which has the higher entropy and explain why. (a) Item 1, a sample of solid CO2 at -78°C, or item 2, CO2 vapor at 0°C (b) Item I, solid sugar, or item 2, the same sugar dissolved in a cup of tea (c) Item 1, a 100-mL sample of pure water and a 100-mL sample of pure alcohol, or item 2, the same samples of water and alcohol after they have been poured together and stirredarrow_forwardConsider the system shown in Figure 16.9. What is the change in entropy for the process where the energy is initially associated with particles A and B, and the energy is distributed between two particles in different boxes (one in A-B, the other in C-D)?arrow_forwardThe combustion of acetylene, C2H2, is a spontaneous reaction given by the equation 2C2H2(g)+5O2(g)4CO2(g)+2H2O(l) As expected for a combustion, the reaction is exothermic. What is the sign of H? What do you expect for the sign of S? Explain the spontaneity of the reaction in terms of the enthalpy and entropy changes.arrow_forward
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