Chemistry: Principles and Reactions
8th Edition
ISBN: 9781305079373
Author: William L. Masterton, Cecile N. Hurley
Publisher: Cengage Learning
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Chapter 16, Problem 16QAP
Predict the order of the following reactions in terms of increasing ΔS:
(a)
(c)
(d)
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Predict the effect of decreasing the temperature on the amounts of reactants in the following reactions:
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2HF(g) → H2(g) + F2(g)
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ΔΗ-ΔΕ
depends on the conditions
Consider the reaction
Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s)Mg(�)+Fe2+(��)→Mg2+(��)+Fe(�)
at 73 ∘C∘C , where [Fe2+]=3.80mol L−1[Fe2+]=3.80mol L−1 and [Mg2+]=0.210mol L−1[Mg2+]=0.210mol L−1 .
What is the cell potential for the reaction
Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s)Mg(�)+Fe2+(��)→Mg2+(��)+Fe(�)
at 73 ∘C∘C when [Fe2+]=3.80mol L−1[Fe2+]=3.80mol L−1 and [Mg2+]=0.210mol L−1[Mg2+]=0.210mol L−1. Assume that the standard cell potential does not depend on temperature.
Express your answer to three significant figures and include the appropriate units.
Chapter 16 Solutions
Chemistry: Principles and Reactions
Ch. 16 - Spontaneous Processes Which of the following...Ch. 16 - Which of the following processes are spontaneous?...Ch. 16 - Which of the following processes are spontaneous?...Ch. 16 - Which of the following processes are spontaneous?...Ch. 16 - On the basis of your experience, predict which...Ch. 16 - On the basis of your experience, predict which of...Ch. 16 - In each of the following pairs, choose the...Ch. 16 - In each of the following pairs, choose the...Ch. 16 - Predict the sign of ΔS for the following: (a) a...Ch. 16 - Predict the sign of S for the following: (a)...
Ch. 16 - Predict the sign of S for each of the following...Ch. 16 - Predict the sign of S for each of the following...Ch. 16 - Predict the sign of S for each of the following...Ch. 16 - Predict the sign of S for each of the following...Ch. 16 - Predict the order of the following reactions in...Ch. 16 - Predict the order of the following reactions in...Ch. 16 - Use Table 16.1 to calculate S for each of the...Ch. 16 - Prob. 18QAPCh. 16 - Use Table 16.1 to calculate S for each of the...Ch. 16 - Use Table 16.1 to calculate S for each of the...Ch. 16 - Prob. 21QAPCh. 16 - Prob. 22QAPCh. 16 - Calculate G at 82C for reactions in which (a)...Ch. 16 - Calculate G at 72C for reactions in which (a)...Ch. 16 - Calculate G at 355 K for each of the reactions in...Ch. 16 - Calculate G at 415 K for each of the reactions in...Ch. 16 - From the values for G f given in Appendix 1,...Ch. 16 - Follow the directions of Problem 27 for each of...Ch. 16 - Use standard entropies and heats of formation to...Ch. 16 - Follow the directions of Question 29 for the...Ch. 16 - It has been proposed that wood alcohol, CH3OH, a...Ch. 16 - Prob. 32QAPCh. 16 - Sodium carbonate, also called washing soda, can be...Ch. 16 - The reaction between magnesium metal and water (l)...Ch. 16 - In the laboratory, POCl3 (phosphorus oxychloride)...Ch. 16 - Oxygen can be made in the laboratory by reacting...Ch. 16 - Phosgene, COCl2, can be formed by the reaction of...Ch. 16 - When permanganate ions in aqueous solution react...Ch. 16 - Discuss the effect of temperature change on the...Ch. 16 - Discuss the effect of temperature on the...Ch. 16 - At what temperature does G become zero for each of...Ch. 16 - Over what temperature range are the reactions in...Ch. 16 - For the reaction...Ch. 16 - For the reaction...Ch. 16 - For the decomposition of Ag2O:...Ch. 16 - Consider the following hypothetical equation...Ch. 16 - Prob. 47QAPCh. 16 - Prob. 48QAPCh. 16 - Red phosphorus is formed by heating white...Ch. 16 - Organ pipes in unheated churches develop tin...Ch. 16 - Prob. 51QAPCh. 16 - Pencil lead is almost pure graphite. Graphite is...Ch. 16 - Given the following data for sodium Na(s): S =51.2...Ch. 16 - Given the following data for bromine: Br2(l); S...Ch. 16 - Show by calculation, using Appendix 1, whether...Ch. 16 - Show by calculation whether the reaction HF(aq)...Ch. 16 - For the reaction...Ch. 16 - For the reaction...Ch. 16 - Consider the reaction 2SO2(g)+O2(g)2SO3(g) (a)...Ch. 16 - Consider the reaction AgCl(s)Ag+(aq)+Cl(aq) (a)...Ch. 16 - Consider the reaction CO(g)+H2O(g)CO2(g)+H2(g) Use...Ch. 16 - Consider the reaction NH4+(aq) H+(aq)+NH3(aq) Use ...Ch. 16 - Consider the following reaction at 25C:...Ch. 16 - Consider the reaction N2O(g)+NO2(g)3NO(g)K=4.41019...Ch. 16 - For the reaction...Ch. 16 - Consider the decomposition of N2O4 at 100C....Ch. 16 - Use the values for G f in Appendix 1 to calculate...Ch. 16 - Given that H f for HF(aq) is -320.1 kJ/mol and S...Ch. 16 - At 25C, a 0.327 M solution of a weak acid HX has a...Ch. 16 - A 0.250 M solution of a weak base R2NH has a pH of...Ch. 16 - Prob. 71QAPCh. 16 - Given the following standard free energies at 25°C...Ch. 16 - Natural gas, which is mostly methane, CH4, is a...Ch. 16 - Prob. 74QAPCh. 16 - When glucose, C6H12O11, is metabolized to CO2 and...Ch. 16 - Consider the following reactions at 25°C:...Ch. 16 - At 1200 K, an equilibrium mixture of CO and CO2...Ch. 16 - Prob. 78QAPCh. 16 - Prob. 79QAPCh. 16 - Prob. 80QAPCh. 16 - Prob. 81QAPCh. 16 - Carbon monoxide poisoning results when carbon...Ch. 16 - Prob. 83QAPCh. 16 - Determine whether each of the following statements...Ch. 16 - Which of the following quantities can be taken to...Ch. 16 - Fill in the blanks: (a) H° and G° become equal at...Ch. 16 - Fill in the blanks: (a) At equilibrium, G is. (b)...Ch. 16 - Prob. 88QAPCh. 16 - Consider the following reaction with its...Ch. 16 - Consider the graph below: (a) Describe the...Ch. 16 - Prob. 91QAPCh. 16 - Prob. 92QAPCh. 16 - Prob. 93QAPCh. 16 - Hf for iodine gas is 62.4 kJ/mol, and S° is 260.7...Ch. 16 - Prob. 95QAPCh. 16 - The overall reaction that occurs when sugar is...Ch. 16 - Hydrogen has been suggested as the fuel of the...Ch. 16 - When a copper wire is exposed to air at room...Ch. 16 - Kafor acetic acid (HC2H3O2) at 25°C is 1.754105 ....Ch. 16 - Consider the reaction 2HI(g)H2(g)+I2(g)At 500C a...Ch. 16 - Prob. 101QAPCh. 16 - Consider the formation of HI(g) from H2(g) and...
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- Silver carbonate, Ag2CO3, is a light yellow compound that decomposes when heated to give silver oxide and carbon dioxide: Ag2CO3(s)Ag2O(s)+CO2(g) A researcher measured the partial pressure of carbon dioxide over a sample of silver carbonate at 220C and found that it was 1.37 atm. Calculate the partial pressure of carbon dioxide at 25C. The standard enthalpies of formation of silver carbonate and silver oxide at 25C are 505.9 kJ/mol and 31.05 kJ/mol, respectively. Make any reasonable assumptions in your calculations. State the assumptions that you make, and note why you think they are reasonable.arrow_forwardMonochloroethane (C2H5Cl) can be produced by the direct reaction of ethane gas (C2H6) with chlorine gas or by the reaction of ethylene gas (C2H4) with hydrogen chloride gas. The second reaction gives almost a 100% yield of pure C2H5Cl at a rapid rate without catalysis. The first method requires light as an energy source or the reaction would not occur. Yet G for the first reaction is considerably more negative than G for the second reaction. Explain how this can be so.arrow_forwardCobalt(II) chloride hexahydrate, CoCl26H2O, is a bright pink compound, but in the presence of very dry air it loses water vapor to the air to produce the light blue anhydrous salt CoCl2. Calculate the standard free-energy change for the reaction at 25C: CoCl26H2O(s)CoCl2(s)+6H2O(g) Here are some thermodynamic data at 25C: What is the partial pressure of water vapor in equilibrium with the anhydrous salt and the hexahydrate at 25C? (Give the value in mmHg.) What is the relative humidity of air that has this partial pressure of water? The relative humidity of a sample of air is Relativehumidity=partialpressureofH2O(g)inairvaporpressureofwater100 What do you expect to happen to the equilibrium partial pressure over the hexahydrate as the temperature is raised? Explain.arrow_forward
- Sodium reacts violently with water according to the equation Na(s) + H2O() NaOH(aq) + H2(g) Without doing calculations, predict the signs of rH and rS for the reaction. Verify your prediction with a calculation.arrow_forwardNatural gas, which is mostly methane, CH4, is a resource that the United States has in abundance. In principle, ethane can be obtained from methane by the reaction 2CH4(g)C2H6(g)+H2(g) (a) Calculate G° at 25°C for the reaction. Comment on the feasibility of this reaction at 25°C. (b) Couple the reaction above with the formation of steam from the elements: H2(g)+12O2(g)H2O(g)G=228.6kJ What is the equation for the overall reaction? Comment on the feasibility of the overall reaction.arrow_forwardCalculate H when a 38-g sample of glucose, C6H12O6(s), burns in excess O2(g) to form CO2(g) and H2O() in a reaction at constant pressure and 298.15 K.arrow_forward
- Reaction at 25.0oC CO(g) + NO(g) → CO2(g) + N2(g) starts with the following initial partial pressures: (PCO2)0 = 0.50 atm, (PN2)0= 0.60 atm, (PCO)0= 5.0×10–35 atm, and (PNO)0 = 5.×10-36 atm. Substance ∆Gof, kJ mol CO2(g) – 394.4 N2(g) 0 CO(g) – 137.3 NO(g) + 86.7 Use the attached standard Gibbs free energies of formation to calculate: (a) KP for the reaction, (b) the immediate Gibbs free energy change for the reaction, ∆Grxn, and (c) check the correct box predicting the direction in which reaction proceeds. Enter your answers with correct units and significant figures, and check the correct box below: Reaction proceeds spontaneously forward towards equilibrium. Reaction is at equilibrium. Reaction proceeds spontaneously backward towards equilibrium.arrow_forwardPredict the effect of decreasingthe temperature on theamounts of reactants in the following reactions:arrow_forwardChemical reaction. Use data to Answer.arrow_forward
- Given: Ea= 790 J/mol A=4.9x10^10 1/M*s Determine Eyring parameters ∆S‡ and ∆H‡ for this reaction at 240 Karrow_forwardA chemist fills a reaction vessel with 8.79 atm methane (CH4) gas, 1.16 atm oxygen (O2) gas, 0.995 atm carbon dioxide (CO2) gas, and 1.22 atm hydrogen (H2) gas at a temperature of 25.0°C. Under these conditions, calculate the reaction free energy AG for the following chemical reaction: CH()+0,(g) CO,(g)+2H₂(g) Use the thermodynamic information in the ALEKS Data tab. Round your answer to the nearest kilojoule.. 1kJ х Garrow_forwardWhich of the following statements are TRUE?(1) Reactions with more negative values of △G0 are spontaneous and proceed at a higher rate than those with less negative values of △G0.(2) The activation energy, Ea, is usually about the same as △H for a reaction.(3) The activation energy for a reaction does not change significantly as temperature changes.(4) Reactions usually occur at faster rates at higher temperatures. (A) 1, 2, 3, 4 (B) 3, 4 (C) 1, 2, 4 (D) 2, 3, 4 (E) 1, 2, 3arrow_forward
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