General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN: 9781305580343
Author: Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher: Cengage Learning
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Textbook Question
Chapter 18, Problem 18.44QP
The free energy of formation of one mole of compound refers to a particular chemical equation. For each of the following, write that equation.
- a MgO(s)
- b COCl2(g)
- c CF4(g)
- d PCl5(g)
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Chapter 18 Solutions
General Chemistry - Standalone book (MindTap Course List)
Ch. 18.2 - You have a sample of 1.0 mg of solid iodine at...Ch. 18.2 - Liquid ethanol, C2H5OH(l), at 25C has an entropy...Ch. 18.3 - Prob. 18.2ECh. 18.3 - Prob. 18.3ECh. 18.4 - Calculate G for the following reaction at 25C. Use...Ch. 18.4 - Prob. 18.5ECh. 18.4 - Prob. 18.6ECh. 18.4 - Prob. 18.2CCCh. 18.6 - Give the expression for K for each of the...Ch. 18.6 - Use the data from Table 18.2 to obtain the...
Ch. 18.6 - Prob. 18.9ECh. 18.6 - Prob. 18.3CCCh. 18.7 - Consider the decomposition of dinitrogen...Ch. 18.7 - The thermodynamic equilibrium constant for the...Ch. 18.7 - To what temperature must magnesium carbonate be...Ch. 18 - What is a spontaneous process? Give three examples...Ch. 18 - Which contains greater entropy, a quantity of...Ch. 18 - State the second law of thermodynamics.Ch. 18 - The entropy change S for a phase transition equals...Ch. 18 - Describe how the standard entropy of hydrogen gas...Ch. 18 - Describe what you would look for in a reaction...Ch. 18 - Define the free energy G. How is G related to H...Ch. 18 - What is meant by the standard free-energy change G...Ch. 18 - Prob. 18.9QPCh. 18 - Prob. 18.10QPCh. 18 - Prob. 18.11QPCh. 18 - Prob. 18.12QPCh. 18 - Prob. 18.13QPCh. 18 - Prob. 18.14QPCh. 18 - Prob. 18.15QPCh. 18 - Prob. 18.16QPCh. 18 - Prob. 18.17QPCh. 18 - You run a reaction that has a negative entropy...Ch. 18 - Prob. 18.19QPCh. 18 - Given the following information at 25C, calculate...Ch. 18 - Prob. 18.21QPCh. 18 - Prob. 18.22QPCh. 18 - For each of the following statements, indicate...Ch. 18 - Which of the following are spontaneous processes?...Ch. 18 - Prob. 18.25QPCh. 18 - Predict the sign of the entropy change for each of...Ch. 18 - Hypothetical elements A(g) and B(g) are introduced...Ch. 18 - Prob. 18.28QPCh. 18 - Prob. 18.29QPCh. 18 - Describe how you would expect the spontaneity (G)...Ch. 18 - Chloroform, CHCl3, is a solvent and has been used...Ch. 18 - Diethyl ether (known simply as ether), (C2H5)2O,...Ch. 18 - The enthalpy change when liquid methanol. CH3OH,...Ch. 18 - The heat of vaporization of carbon disulfide, CS2,...Ch. 18 - Predict the sign of S, if possible, for each of...Ch. 18 - Predict the sign of S, if possible, for each of...Ch. 18 - Calculate S for the following reactions, using...Ch. 18 - Calculate S for the following reactions, using...Ch. 18 - Calculate S for the reaction...Ch. 18 - What is the change in entropy, S, for the reaction...Ch. 18 - Using enthalpies of formation (Appendix C),...Ch. 18 - Using enthalpies of formation (Appendix C),...Ch. 18 - The free energy of formation of one mole of...Ch. 18 - The free energy of formation of one mole of...Ch. 18 - Calculate the standard free energy of the...Ch. 18 - Calculate the standard free energy of the...Ch. 18 - On the basis of G for each of the following...Ch. 18 - For each of the following reactions, state whether...Ch. 18 - Calculate H and G for the following reactions at...Ch. 18 - Calculate H and G for the following reactions at...Ch. 18 - Consider the reaction of 2 mol H2(g) at 25C and 1...Ch. 18 - Consider the reaction of 1 mol H2(g) at 25C and 1...Ch. 18 - What is the maximum work that could be obtained...Ch. 18 - What is the maximum work that could be obtained...Ch. 18 - Give the expression for the thermodynamic...Ch. 18 - Write the expression for the thermodynamic...Ch. 18 - What is the standard free-energy change G at 25C...Ch. 18 - What is the standard free-energy change G at 25C...Ch. 18 - Calculate the standard free-energy change and the...Ch. 18 - Calculate the standard free-energy change and the...Ch. 18 - Obtain the equilibrium constant Kc at 25C from the...Ch. 18 - Calculate the equilibrium constant Kc at 25C from...Ch. 18 - Use data given in Tables 6.2 and 18.1 to obtain...Ch. 18 - Use data given in Tables 6.2 and 18.1 to obtain...Ch. 18 - Sodium carbonate, Na2CO3, can be prepared by...Ch. 18 - Oxygen was first prepared by heating mercury(II)...Ch. 18 - Prob. 18.67QPCh. 18 - The combustion of acetylene, C2H2, is a...Ch. 18 - Prob. 18.69QPCh. 18 - Prob. 18.70QPCh. 18 - Acetic acid, CH3COOH, freezes at 16.6C. The heat...Ch. 18 - Acetone, CH3COCH3, boils at 56C. The heat of...Ch. 18 - Prob. 18.73QPCh. 18 - Prob. 18.74QPCh. 18 - Prob. 18.75QPCh. 18 - Ethanol burns in air or oxygen according to the...Ch. 18 - Acetic acid in vinegar results from the bacterial...Ch. 18 - Prob. 18.78QPCh. 18 - Is the following reaction spontaneous as written?...Ch. 18 - Is the following reaction spontaneous as written?...Ch. 18 - Prob. 18.81QPCh. 18 - The reaction N2(g)+3H2(g)2NH3(g) is spontaneous at...Ch. 18 - Prob. 18.83QPCh. 18 - Calculate G at 25C for the reaction...Ch. 18 - Prob. 18.85QPCh. 18 - Consider the reaction CS2(g)+4H2(g)CH4(g)+2H2S(g)...Ch. 18 - Prob. 18.87QPCh. 18 - a From a consideration of the following reactions,...Ch. 18 - For the reaction CH3OH(l)+32O2(g)2H2O(l)+CO2(g)...Ch. 18 - Prob. 18.90QPCh. 18 - Prob. 18.91QPCh. 18 - Tungsten is usually produced by the reduction of...Ch. 18 - For the decomposition of formic acid,...Ch. 18 - Prob. 18.94QPCh. 18 - For the reaction 2Cu(s)+S(s)Cu2S(s) H and G are...Ch. 18 - Prob. 18.96QPCh. 18 - When 1.000 g of gaseous butane, C4H10, is burned...Ch. 18 - When 1.000 g of ethylene glycol, C2H6O2, is burned...Ch. 18 - a Calculate K1, at 25C for phosphoric acid:...Ch. 18 - a Calculate K1, at 25C for sulfurous acid:...Ch. 18 - The direct reaction of iron(III) oxide. Fe2O3, to...Ch. 18 - Prob. 18.102QPCh. 18 - Prob. 18.103QPCh. 18 - Prob. 18.104QPCh. 18 - Prob. 18.105QPCh. 18 - Cobalt(II) chloride hexahydrate, CoCl26H2O, is a...Ch. 18 - Prob. 18.107QPCh. 18 - Hydrogen gas and iodine vapor react to produce...Ch. 18 - Silver carbonate, Ag2CO3, is a light yellow...Ch. 18 - Prob. 18.110QPCh. 18 - Adenosine triphosphate, ATP, is used as a...Ch. 18 - Prob. 18.112QPCh. 18 - Prob. 18.113QPCh. 18 - Prob. 18.114QPCh. 18 - Sodium acetate crystallizes from a supersaturated...Ch. 18 - According to a source, lithium peroxide (Li2O2)...Ch. 18 - Tetrachloromethane (carbon tetrachloride), CCl4,...Ch. 18 - Prob. 18.118QPCh. 18 - Prob. 18.119QPCh. 18 - Prob. 18.120QPCh. 18 - Prob. 18.121QPCh. 18 - Coal is used as a fuel in some electric-generating...Ch. 18 - Hydrogen bromide dissociates into its gaseous...Ch. 18 - Hydrogen gas and iodine gas react to form hydrogen...Ch. 18 - Prob. 18.125QPCh. 18 - Prob. 18.126QPCh. 18 - Ka for acetic acid at 25.0C is 1754 105. At...Ch. 18 - Ksp for silver chloride at 25.0C is 1.782 1010....
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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_forwardWhat is incomplete combustion of fossil fuels? Why can this be a problem?arrow_forwardThe value of G for the reaction 2C4H10(g)+13O2(g)8CO2(g)+10H2O(l) is 5490. kJ. Use this value and data from Appendix 4 to calculate the standard free energy of formation for C4H 10(g).arrow_forward
- From the data given in Appendix I, determine the standard enthalpy change and the standard free energy change for each of the following reactions: (a) BF3(g)+3H2O(l)B(OH)3(s)+3HF(g) (b) BCl3(g)+3H2O(l)B(OH)3+3HCl(g) (c) B2H6(g)+6H2O(l)2B(OH)3(s)+6H2(g)arrow_forwardThe free energy of formation of one mole of compound refers to a particular chemical equation. For each of the following, write that equation. a KBr(s) b CH3Cl(l) c H2S(g) d AsH3(g)arrow_forward9.68 What are some features of petroleum that make it such an attractive fuel?arrow_forward
- Using values of fH and S, calculate the standard molar free energy of formation, fG, for each of the following: (a) Ca(OH)2(s) (b) Cl(g) (c) Na2CO3(s) Compare your calculated values of fG with those listed in Appendix L. Which of these formation reactions are predicted to be product-favored at equilibrium at 25 C?arrow_forwardWhich of the following processes are spontaneous? a. A house is built. b. A satellite is launched into orbit. c. A satellite falls back to the earth. d. The kitchen gets cluttered.arrow_forwardCoal is used as a fuel in some electric-generating plants. Coal is a complex material, but for simplicity we may consider it to be a form of carbon. The energy that can be derived from a fuel is sometimes compared with the enthalpy of the combustion reaction: C(s)+O2(g)CO2(g) Calculate the standard enthalpy change for this reaction at 25C. Actually, only a fraction of the heat from this reaction is available to produce electric energy. In electric generating plants, this reaction is used to generate heat for a steam engine, which turns the generator. Basically the steam engine is a type of heat engine in which steam enters the engine at high temperature (Th), work is done, and the steam then exits at a lower temperature (Tl). The maximum fraction, f, of heat available to produce useful energy depends on the difference between these temperatures (expressed in kelvins), f = (Th Tl)/Th. What is the maximum heat energy available for useful work from the combustion of 1.00 mol of C(s) to CO2(g)? (Assume the value of H calculated at 25C for the heat obtained in the generator.) It is possible to consider more efficient ways to obtain useful energy from a fuel. For example, methane can be burned in a fuel cell to generate electricity directly. The maximum useful energy obtained in these cases is the maximum work, which equals the free-energy change. Calculate the standard free-energy change for the combustion of 1.00 mol of C(s) to CO2(g). Compare this value with the maximum obtained with the heat engine described here.arrow_forward
- The equilibrium constant for a reaction is 31015 (a) Without carrying out any calculation, discuss whether ?G° for the reaction is positive or negative. (b) Calculate ?G° for this reaction.arrow_forwardUse the standard free energy of formation data in Appendix G to determine the free energy change for each of the following reactions, which are run under standard state conditions and 25 C. Identify each as either spontaneous or nonspontaneous at these conditions. (a) MnO2(s)Mn(s)+O2(g) (b) H2(g)+Br2(l)2HBr(g) (c) Cu(s)+S(g)CuS(s) (d) 2LiOH(s)+CO2(g)Li2CO3(s)+H2O(g) (e) CH4(g)+O2(g)C(s,graphite)+2H2O(g) (f) CS2(g)+3Cl2(g)CCl4(g)+S2Cl2(g)arrow_forwardWhat information can be determined from G for a reaction? Does one get the same information from G, the standard free energy change? G allows determination of the equilibrium constant K for a reaction. How? How can one estimate the value of K at temperatures other than 25C for a reaction? How can one estimate the temperature where K = 1 for a reaction? Do all reactions have a specific temperature where K = 1?arrow_forward
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