Chemistry: The Central Science (14th Edition)
14th Edition
ISBN: 9780134414232
Author: Theodore E. Brown, H. Eugene LeMay, Bruce E. Bursten, Catherine Murphy, Patrick Woodward, Matthew E. Stoltzfus
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 19.5, Problem 19.6.1PE
Which of these statements is true?
- All spontaneous reactions have a negative enthalpy change
- All spontaneous reactions have a positive enthalpy change
- All spontaneous reactions have a positive free-energy change
- All spontaneous reactions have a negetive free-energy change
- All spontaneous reactions have a negative entropy change
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
A spontaneous reaction always has:
A.
a positive enthalpy change and a negative entropy change.
B.
a positive Gibbs free energy change.
C.
a negative Gibbs free energy change.
D.
a standard enthalpy of formation equal to zero for one of the reactants.
E.
a standard free energy of formation equal to zero for one of the reactants.
Which of the following conditions will favor a spontaneous reaction?
a. a negative value of Gibb's free energy and a positive value of entropy
b. a negative value of Gibb's free energy and a negative value of entropy
c. a positive value of Gibb's free energy and a positive value of entropy
d. a positive value of Gibb's free energy and negative entropy
Which of these statements is true? (a) All spontaneous reactionshave a negative enthalpy change (b) All spontaneousreactions have a positive entropy change (c) All spontaneousreactions have a positive free-energy change (d) All spontaneousreactions have a negative free-energy change (e) Allspontaneous reactions have a negative entropy change
Chapter 19 Solutions
Chemistry: The Central Science (14th Edition)
Ch. 19.1 - The process of iron being oxidized to make iron...Ch. 19.1 - At 1 atm pressure, CO2(s) sublimes at 78oC. Is...Ch. 19.2 - Prob. 19.2.1PECh. 19.2 - Prob. 19.2.2PECh. 19.3 - Prob. 19.3.1PECh. 19.3 - Prob. 19.3.2PECh. 19.3 - Prob. 19.4.1PECh. 19.3 - Prob. 19.4.2PECh. 19.4 - Prob. 19.5.1PECh. 19.4 - Using the standard molar entropies in Appendix C,...
Ch. 19.5 - Which of these statements is true? All spontaneous...Ch. 19.5 - Prob. 19.6.2PECh. 19.5 - Prob. 19.7.1PECh. 19.5 - Prob. 19.7.2PECh. 19.5 - Prob. 19.8.1PECh. 19.5 - Prob. 19.8.2PECh. 19.6 - What is the temperature above which the Haber...Ch. 19.6 - Prob. 19.9.2PECh. 19.7 - Prob. 19.10.1PECh. 19.7 - Prob. 19.10.2PECh. 19.7 - Prob. 19.11.1PECh. 19.7 - Prob. 19.11.2PECh. 19.7 - Prob. 19.12.1PECh. 19.7 - Prob. 19.12.2PECh. 19 - Prob. 1DECh. 19 - Prob. 1ECh. 19 - As shown here, one type of computer keyboard...Ch. 19 - 19.3
a. What are the signs of ΔS and ΔH for the...Ch. 19 - Predict the signs of H and S for this reaction....Ch. 19 - The accompanying diagram shows how entropy varies...Ch. 19 - Prob. 6ECh. 19 - The accompanying diagram shows how H (red line)...Ch. 19 - Prob. 8ECh. 19 - Prob. 9ECh. 19 - Prob. 10ECh. 19 - Prob. 11ECh. 19 - Prob. 12ECh. 19 - Prob. 13ECh. 19 - Can endothermic chemical reaction be spontaneous?...Ch. 19 - Prob. 15ECh. 19 - Prob. 16ECh. 19 - Prob. 17ECh. 19 - Prob. 18ECh. 19 - Prob. 19ECh. 19 - Prob. 20ECh. 19 - Prob. 21ECh. 19 - Prob. 22ECh. 19 - Prob. 23ECh. 19 - Prob. 24ECh. 19 - Prob. 25ECh. 19 - Prob. 26ECh. 19 - Prob. 27ECh. 19 - Prob. 28ECh. 19 - Prob. 29ECh. 19 - Prob. 30ECh. 19 - Prob. 31ECh. 19 - Using the heat of vaporization in Appendix B,...Ch. 19 - Prob. 33ECh. 19 - Prob. 34ECh. 19 - Prob. 35ECh. 19 - Prob. 36ECh. 19 - Prob. 37ECh. 19 - Prob. 38ECh. 19 - For each of the following pairs, predict which...Ch. 19 - For each of the following pairs, predict which...Ch. 19 - Predict the sign of the entropy change of the...Ch. 19 - Prob. 42ECh. 19 - Prob. 43ECh. 19 - 19.44 Propanol (C3H7OH) melts at – 126.5 o C and...Ch. 19 - Prob. 45ECh. 19 - Prob. 46ECh. 19 - Prob. 47ECh. 19 - Prob. 48ECh. 19 - Prob. 49ECh. 19 - Prob. 50ECh. 19 - Using So values from Appendix C, calculate So...Ch. 19 - Calculate So values for the following reactions by...Ch. 19 - Prob. 53ECh. 19 - Prob. 54ECh. 19 - For a certain chemical reaction, Ho = -35.4 kJ and...Ch. 19 - A certain reaction has Ho = +23.7.kJ and So = +...Ch. 19 - Using data in Appendix C, calculate Ho, So, and Go...Ch. 19 - Prob. 58ECh. 19 - Prob. 59ECh. 19 - Prob. 60ECh. 19 - Prob. 61ECh. 19 - Prob. 62ECh. 19 - Prob. 63ECh. 19 - Prob. 64ECh. 19 - Prob. 65ECh. 19 - Prob. 66ECh. 19 - Prob. 67ECh. 19 - Prob. 68ECh. 19 - Prob. 69ECh. 19 - Prob. 70ECh. 19 - a. Use data in Appendix c to estimate the boiling...Ch. 19 - Prob. 72ECh. 19 - Prob. 73ECh. 19 - Prob. 74ECh. 19 - Prob. 75ECh. 19 - Prob. 76ECh. 19 - Prob. 77ECh. 19 - 19.78 Consider the reaction 3CH4(g) C3H8(g) ...Ch. 19 - Use data from Appendix C to calculate the...Ch. 19 - Prob. 80ECh. 19 - Prob. 81ECh. 19 - Prob. 82ECh. 19 - Prob. 83ECh. 19 - Prob. 84ECh. 19 - Prob. 85AECh. 19 - Prob. 86AECh. 19 - Prob. 87AECh. 19 - Prob. 88AECh. 19 - Prob. 89AECh. 19 - Prob. 90AECh. 19 - Prob. 91AECh. 19 - Prob. 92AECh. 19 - Prob. 93AECh. 19 - Prob. 94AECh. 19 - Prob. 95AECh. 19 - Prob. 96AECh. 19 - Prob. 97AECh. 19 - Prob. 98AECh. 19 - Prob. 99AECh. 19 - Prob. 100AECh. 19 - Prob. 101AECh. 19 - Prob. 102AECh. 19 - Most liquids follow Trouton’s rule (see Exercise...Ch. 19 - In chemical kinetics, the entropy of activation is...Ch. 19 - Prob. 105IECh. 19 - Prob. 106IECh. 19 - Prob. 107IECh. 19 - Prob. 108IECh. 19 - The following data compare the standard enthalpies...Ch. 19 - Prob. 110IECh. 19 - Prob. 111IECh. 19 - Prob. 112IE
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Similar questions
- What can be said about an endothermic reaction with a negative entropy change? The reaction is spontaneous at all temperatures. spontaneous at high temperatures. spontaneous at low temperatures. spontaneous in the reverse direction at all temperatures. nonspontaneous in either direction at all temperatures. What can be said about an endothermic reaction with a negative entropy change? spontaneous at all temperatures. spontaneous at high temperatures. spontaneous at low temperatures. spontaneous in the reverse direction at all temperatures. nonspontaneous in either direction at all temperatures.arrow_forwardWrite True on the space provided if the statement is true. Write False if the statement is false. ____________1. The spontaneity of a reaction is determined by the enthalpy of the reaction. ____________ 2. The second law of thermodynamics helps keep track of energy flow between the system and surroundings, and also indicates the spontaneity of the process. ____________ 3. All spontaneous reactions are exothermic reactions. ____________ 4. When a reaction mixture is mostly products, the total free energy increases as the reaction proceeds spontaneously in the forward reaction. _____________5. The work done by a spontaneous reaction is always less than the ΔG for the reaction. _____________6. The spontaneity of a reaction also gives an indication of the speed of a reaction. _____________7. Molecular systems tend to move spontaneously to a state of a maximum randomness or disorder. _____________ 8. Energy and enthalpy are the two driving forces for chemical and physical…arrow_forwardIndicate whether each statement is true or false. All spontaneous processes are fast.arrow_forward
- Determine whether each of the following statements about the thermodynamic functions are True or False as they apply to chemical reactions.True False Entropy and temperature are multiplied in the Gibbs free energy. True False The enthalpy change does not effect spontaneity. True False The heat of reaction at constant pressure is always equal to the work done by the reaction. True False All spontaneous chemical reactions have positive entropy changes. True False Spontaneity is increased by positive entropy changes.arrow_forwardA certain reaction has negative value of both ∆H and ∆S. Therefore, the reaction must be spontaneous at all temperature cannot be spontaneous at any temperature cannot be spontaneous if the temperature is high enough cannot be spontaneous if the temperature is low enough has a positive free energy at any temperaturearrow_forwardDetermine whether each of the following statements about the thermodynamic functions are True or False as they apply to chemical reactions.The heat of reaction at constant volume is always equal to the heat of reaction at constant pressure.Entropy and temperature are multiplied in the Gibbs free energy.Negative enthalpy changes increase spontaneity.The entropy change does not effect spontaneity.All spontaneous chemical reactions have no heat of reaction.arrow_forward
- Classify each of the following reactions as one of the four possible types summarized in Table 19.3: (i) spontaneous at all temperatures; (ii) not spontaneous at any temperature; (iii) spontaneous at low T but not spontaneous at high T; (iv) spontaneous at high T but not spontaneous atlow T.(a) N21g2 + 3 F21g2 ¡ 2 NF31g2 ∆H° = -249 kJ; ∆S° = -278 J>K(b) N21g2 + 3 Cl21g2 ¡ 2 NCl31g2 ∆H° = 460 kJ; ∆S° = -275 J>K(c) N2F41g2 ¡ 2 NF21g2 ∆H° = 85 kJ; ∆S° = 198 J>Karrow_forwardWhich of the following statements is false? Group of answer choices A spontaneous reaction can be endothermic. A spontaneous reaction can be very slow. A catalyst can be used to speed up some spontaneous reactions. A spontaneous reaction must have a negative enthalpy change. A spontaneous reaction can have a high activation energy.arrow_forwardWould you expect the entropy change for the following reaction to be positive or negative? H2O (s) --> H2O (g)arrow_forward
- Can someone draw an energy Diagram with the following: The reaction is not spontaneous, the first step is exergonic and slow, the reaction has a total of three steps, the second step is a slow equilibrium, and the third step is faster than the first And how would I go about taking this information and drawing a energy diagram? arrow_forwardAt equilibrium, the free energy of the reactants is equal to the free energy of the products. true or falsearrow_forwardTRUE OR FALSE? 1. Entropy changes cannot be measured with a calorimeter like enthalpy changes. 2. If the result upon calculation of entropy changes in the universe is a positive value, the process is reactant-favored. 3. If the change in free energy, ΔG is negative, the reaction is spontaneous in the forward direction.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Chemistry: Principles and PracticeChemistryISBN:9780534420123Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward MercerPublisher:Cengage Learning
Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage Learning
Chemistry: Principles and Practice
Chemistry
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Cengage Learning
Chemistry: The Molecular Science
Chemistry
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:Cengage Learning
The Laws of Thermodynamics, Entropy, and Gibbs Free Energy; Author: Professor Dave Explains;https://www.youtube.com/watch?v=8N1BxHgsoOw;License: Standard YouTube License, CC-BY