Chemistry: Structure and Properties (2nd Edition)
2nd Edition
ISBN: 9780134293936
Author: Nivaldo J. Tro
Publisher: PEARSON
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Textbook Question
Chapter 15, Problem 20E
What is the effect of temperature change on a chemical initially at equilibrium? How does the effect differ for an exothermic reaction compared to an endothermic one?
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Chapter 15 Solutions
Chemistry: Structure and Properties (2nd Edition)
Ch. 15 - How does a developing fetus get oxygen in the...Ch. 15 - What is dynamic equilibrium? Why is it called...Ch. 15 - Give the general expression for the equilibrium...Ch. 15 - What is the significance of the equilibrium...Ch. 15 - What happens to the value of the equilibrium...Ch. 15 - If two reactions sum to an overall reaction, and...Ch. 15 - Explain the difference between Kcand Kp. For a...Ch. 15 - What units should you use when expressing...Ch. 15 - Why do we omit the concentrations of solids and...Ch. 15 - Does the value of the equilibrium constant depend...
Ch. 15 - Explain how you might deduce the equilibrium...Ch. 15 - What is the definition of the reaction quotient ()...Ch. 15 - What is the value of when each reactant and...Ch. 15 - Prob. 14ECh. 15 - Many equilibrium calculations involve finding the...Ch. 15 - In equilibrium problems involving equilibrium...Ch. 15 - What happens to a chemical system at equilibrium...Ch. 15 - What is the effect of a change in concentration of...Ch. 15 - What is the effect of a change in volume on a...Ch. 15 - What is the effect of temperature change on a...Ch. 15 - Write an expression for the equilibrium constant...Ch. 15 - Find and fix each mistake in the equilibrium...Ch. 15 - When the reaction comes to equilibrium, will the...Ch. 15 - Ethene (C2H4) can be halogenated by this reaction:...Ch. 15 - H2 and I2 are combined in a flask and allowed to...Ch. 15 - A chemist trying to synthesize a particular...Ch. 15 - This reaction has an equilibrium constant of...Ch. 15 - This reaction has an equilibrium constant of...Ch. 15 - Prob. 29ECh. 15 - Use the following reactions and their equilibrium...Ch. 15 - Calculate Kc for reaction a. I2(g)2I(g)Kp=6.261022...Ch. 15 - Calculate Kpfor each reaction. a. N2O4(g)2NO2(g)...Ch. 15 - Write an equilibrium expression for each chemical...Ch. 15 - Find and fix the mistake in the equilibrium...Ch. 15 - Consider the reaction: CO(g)+2H2(g)CH3OH(g) An...Ch. 15 - Consider the reaction: NH4HS(s)NH3(g)+H2S(g) An...Ch. 15 - Consider the reaction: N2(g)+3H2(g)2NH3(g)...Ch. 15 - Consider the reaction: H2(g)+I2(g)2HI(g) Complete...Ch. 15 - Consider the reaction: 2NO(g)+Br2(g)2NOBr(g)Kp=...Ch. 15 - Consider the reaction:...Ch. 15 - For the reaction A(g)2B(g) , a reaction vessel...Ch. 15 - For the reaction 2A(g)B(g)+2C(g) , a reaction...Ch. 15 - Consider the reaction:...Ch. 15 - Consider the reaction: SO2Cl2(g)SO2+Cl2(g) A...Ch. 15 - Consider the reaction: H2(g)+I2(g)2HI(g) A...Ch. 15 - Consider the reaction. CO(g)+2H2(g)CH3OH(g) A...Ch. 15 - Consider the reaction: NH4HS(s)NH3(g)+H2S(g) At a...Ch. 15 - Consider the reaction:...Ch. 15 - Silver sulfate dissolves in water according to the...Ch. 15 - Nitrogen dioxide reacts with itself according to...Ch. 15 - Consider the reaction and the associated...Ch. 15 - Consider the reaction and the associated...Ch. 15 - For the reaction Kc= 0.513 at 500K. N2O4(g)2NO2(g)...Ch. 15 - For the reaction, Kc= 255 at 1000 K...Ch. 15 - Consider the reaction: NiO(s)+CO(g)Ni(s)+CO2(g)...Ch. 15 - Consider the reaction: CO(g)+H2O(g)CO2(g)+H2(g)Kc=...Ch. 15 - Consider the reaction: HC 2 H 3 O 2 (aq)+ H 2 O(l)...Ch. 15 - Prob. 58ECh. 15 - Consider the reaction:...Ch. 15 - Consider the reaction:...Ch. 15 - Consider the reaction: A(g)B(g)+C(g) Find the...Ch. 15 - Consider the reaction: A(g)2B(g) Find the...Ch. 15 - Consider this reaction at equilibrium:...Ch. 15 - Consider this reaction at equilibrium:...Ch. 15 - Consider this reaction at equilibrium:...Ch. 15 - Prob. 66ECh. 15 - Each reaction is allowed to come to equilibrium,...Ch. 15 - Prob. 68ECh. 15 - This reaction is endothermic: C(s)+CO2(g)2CO(g)...Ch. 15 - This reaction is exothermic:...Ch. 15 - Coal, which is primarily carbon, can be converted...Ch. 15 - Coal can be used to generate hydrogen gas (a...Ch. 15 - Carbon monoxide replaces oxygen in oxygenated...Ch. 15 - Nitrogen monoxide is a pollutant in the lower...Ch. 15 - The reaction CO2(g)+C(s)2CO(g) has Kp= 5.78 at...Ch. 15 - A mixture of water and graphite is heated to 600...Ch. 15 - At 650 K, the reaction MgCO3(s)MgO(s)+CO2(g) has...Ch. 15 - A system at equilibrium contains I2(g) at a...Ch. 15 - Consider the exothermic reaction:...Ch. 15 - Consider the endothermic reaction:...Ch. 15 - Consider the reaction: H2(g)+I2(g)2HI(g) A...Ch. 15 - Prob. 82ECh. 15 - Prob. 83ECh. 15 - Prob. 84ECh. 15 - The system described by the reaction:...Ch. 15 - A reaction vessel at 27017°C contains a mixture of...Ch. 15 - At 70 K, CCl4 decomposes to carbon and chlorine....Ch. 15 - The equilibrium constant for the reaction...Ch. 15 - A sample of CaCO3(s) is introduced into a sealed...Ch. 15 - An equilibrium mixture contains N2O4, (P = O.28)...Ch. 15 - Carbon monoxide and chlorine gas react to form...Ch. 15 - Prob. 92ECh. 15 - Prob. 93ECh. 15 - Prob. 94ECh. 15 - Nitrogen monoxide reacts with chlorine gas...Ch. 15 - At a given temperature, a system containing O2(g)...Ch. 15 - A sample of pure NO2 is heated to 337 °C, at which...Ch. 15 - When N2O5(g) is heated, it dissociates into...Ch. 15 - A sample of SO3 is introduced into an evacuated...Ch. 15 - A reaction A(g)B(g) has an equilibrium constant of...Ch. 15 - The reaction A(g)2B(g) has an equilibrium constant...Ch. 15 - A particular reaction has an equilibrium constant...Ch. 15 - Consider the reaction: aA(g)bB(g) Each of the...Ch. 15 - Consider the simple one-step reaction: A(g)B(g)...Ch. 15 - Prob. 105ECh. 15 - Consider the reaction: N2(g)+3H2(g)2NH3(g). a....Ch. 15 - For the reaction AB , the ratio of products to...Ch. 15 - Solve each of the expressions for x using the...Ch. 15 - Have each group member explain to the group what...Ch. 15 - Prob. 110ECh. 15 - What is the correct expression for the equilibrium...Ch. 15 - Prob. 2SAQCh. 15 - Use the data below to find the equilibrium...Ch. 15 - The reaction shown here has a Kp = 4.5X102 AT 825...Ch. 15 - Consider the reaction between NO and Cl2 to form...Ch. 15 - Prob. 6SAQCh. 15 - Consider the reaction between iodine gas and...Ch. 15 - Prob. 8SAQCh. 15 - The decomposition of NH4HS is endothermic:...Ch. 15 - The solid XY decomposes into gaseous X and Y:...Ch. 15 - What is the effect of adding helium gas (at...Ch. 15 - Prob. 12SAQ
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- . What does it mean to say that a state of chemical or physical equilibrium is dynamic?arrow_forward. Consider the following exothermic reaction at equilibrium: N2(g)+3H2(g)2NH3(g)Predict how the following changes affect the number of moles of each component of the system after equilibrium is re-established by completing the table. Complete the table with the terms increase, decrease, or no change. N2 H2 NH3 Add N2(g) Remove H2(g) Add NH3(g) Add Ne(g) (constant V) Increase the temperature Decrease the volume (constant T) Add a catalystarrow_forwardIndicate whether or not each of the following changes would affect the value of a systems equilibrium constant. a. Addition of a product to the equilibrium mixture b. Increase in the systems total pressure c. Increase in the systems temperature d. Addition of both a reactant and a product to the equilibrium mixturearrow_forward
- When a mixture of hydrogen and bromine is maintained at normal atmospheric pressure and heated above 200. °C in a closed container, the hydrogen and bromine react to form hydrogen bromide and a gas-phase equilibrium is established. Write a balanced chemical equation for the equilibrium reaction. Use bond enthalpies from Table 6.2 ( Sec. 6-6b) to estimate the enthalpy change for the reaction. Based on your answers to parts (a) and (b), which is more important in determining the position of this equilibrium, the entropy effect or the energy effect? In which direction will the equilibrium shift as the temperature increases above 200. °C? Explain. Suppose that the pressure were increased to triple its initial value. In which direction would the equilibrium shift? Why is the equilibrium not established at room temperature?arrow_forwardFor the equilibrium reaction in Question 4, write the expression for the equilibrium constant. (a) How would this equilibrium constant change if the total pressure on the system were doubled? (b) How would the equilibrium constant change if the temperature were increased?arrow_forwardConsider the following equilibrium system. N2(g)+O2(g)2NO(g) a. Write the chemical equation for the forward reaction. b. Write the chemical equation for the reverse reaction.arrow_forward
- Tell what will happen to each equilibrium concentration in the following when the indicated stress is applied and a new equilibrium position is established. a. LiOH(s)+CO2(g)LiHCO3(s)+heat; CO2 is removed. b. 2NaHCO3(s)+heatNa2O(s)+2CO2(g)+H2O(g); The system is cooled. c. CaCO3(s)+heatCaO(s)+CO2(g); The system is cooled.arrow_forwardIndicate whether or not each of the following changes would affect the value of a systems equilibrium constant. a. Removal of a reactant from the equilibrium mixture b. Decrease in the systems total pressure c. Decrease in the systems temperature d. Addition of a catalyst to the equilibrium mixturearrow_forward. Explain what it means that a reaction has reached a state of chemical equilibrium. Explain why equilibrium is a dynamic state: Does a reaction really “stop” when the system reaches a state of equilibrium? Explain why, once a chemical system has reached equilibrium, the concentrations of all reactants remain constant with time. Why does this constancy of concentration not contradict our picture of equilibrium as being dynamic? What happens to the rates of the forward and reverse reactions as a system proceeds to equilibrium from a starting point where only reactants are present?arrow_forward
- Write a balanced chemical equation for a totally gaseous equilibrium system that would lead to the following equilibrium constant expression. Keq=[N2]2[H2O]6[NH3]4[O2]3arrow_forwardHow does equilibrium represent the balancing of opposing processes? Give an example of an “equilibrium” encountered in everyday life, showing how the processes involved oppose each other.arrow_forwardFor the generalized chemical reaction A(g)+B(g)C(g)+D(g) determine whether the concentration of D in an equilibrium mixture will (1) increase, (2) decrease, or (3) not change when each of the following changes is effected. a. concentration of A is increased b. concentration of B is decreased c. concentration of C is increased d. concentration of C is decreasedarrow_forward
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