2. Which of the following is correct about a chemical reaction? A. A chemical reaction will result in new elements being formed. B. Some chemical reactions are irreversible, and others are reversible. C. A chemical reaction will always result in increased disorderliness between particles of the substances. D. A reaction is complete when its reaction quotient equals the equilibrium constant.

2. Which of the following is correct about a chemical reaction? A. A chemical reaction will result in new elements being formed. B. Some chemical reactions are irreversible, and others are reversible. C. A chemical reaction will always result in increased disorderliness between particles of the substances. D. A reaction is complete when its reaction quotient equals the equilibrium constant.

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter12: Chemical Equilibrium

Section: Chapter Questions

Problem 12.100PAE: 12.100 A reaction important in smog formation is O3(g)+NO(g)O2(g)+NO2(g)K=6.01034 (a) If the initial...

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12.100 A reaction important in smog formation is O3(g)+NO(g)O2(g)+NO2(g)K=6.01034 (a) If the initial concentrations are [O3]=1.0106M,[NO]=1.0105M,[NO2]=2.5104M, and [O2]=8.2103M , is the system at equilibrium? If not, in which direction does the reaction proceed? (b) If the temperature is increased, as on a very warm day, will the concentrations of the products increase or decrease? (HINT: You may have to calculate the enthalpy change for the reaction to find out if it is exothermic or endothermic.)
In the figure, orange fish are placed in one aquarium and green fish in an adjoining aquarium. The two tanks are separated by a removable partition that is initially closed. (a) Describe what happens in the first few minutes after the partition is opened. (b) What would you expect to see several hours later? (c) How is this system analogous to dynamic chemical equilibrium?
. Hydrogen gas, oxygen gas, and water vapor are in equilibrium in a closed container. Hydrogen gas is injected into the container, and the system is allowed to return to equilibrium. Which of the following occurs? Explain your answer. 2H2(g)+O2(g)2H2O(g)a. The concentration of oxygen gas remains constant. b. The value for K increases. c. The concentration of oxygen gas increases. d. The concentration of water vapor increases. e. The value for K decreases.
. For an equilibrium involving gaseous substances, what effect, in general terms, is realized when the volume of the system is decreased?
Consider the equilibrium process depicted in Fig. 17.6. When does the equilibrium state occur?
. What does it mean to say that all chemical reactions are, to one extent or another, reversible?