Plots of
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Source: G.N. Lewis and M.Rabdall,
K. Pitzer and L.Brewer, McGraw-Hill, New York,
Extrapolate to
Trending nowThis is a popular solution!
Chapter 3 Solutions
Physical Chemistry
- The standard molar entropy of methanol vapor, CH3OH(g), is 239.8 J K1 mol-1. (a) Calculate the entropy change for the vaporization of 1 mol methanol (use data from Table 16.1 or Appendix J). (b) Calculate the enthalpy of vaporization of methanol, assuming that rS doesnt depend on temperature and taking the boiling point of methanol to be 64.6C.arrow_forwardChemists and engineers who design nuclear power plants have to worry about high-temperature reactions because it is possible for water to decompose. (a) Under what conditions does this reaction occur spontaneously? 2H2O(g) 2H2(g) + O2(g) (b) Under conditions where the decomposition of water is spontaneous, do nuclear engineers have to worry about an oxygen/hydrogen explosion? Justify your answer.arrow_forwardLiquid water at 25C is introduced into an evacuated, insulated vessel. Identify the signs of the following thermodynamic functions for the process that occurs: H, S, Twater, Ssurr,, Suniv.arrow_forward
- In the thermodynamic definition of a spontaneous process, why is it important that the phrase “continuous intervention” be used rather than just “intervention?”arrow_forwardWhat is the sign of the standard Gibbs free-energy change at low temperatures and at high temperatures for the synthesis of ammonia? 3H2(g) + N2(g) 2NH3(g)arrow_forwardWhat is the total entropy change at 25oC for the reaction below, if the standard entropies of reactants and products are So (C(gr)) = 5.74 J/mol*K, So (H2(g)) = 130.68 J/mol*K, and So (C6H10(g)) = 369.5000 J/mol*K and the heat of formation of C6H10(g)) is 123.7000 kJ/mol. (PLEASE SOLVE WITH CLEAR HANDWRITING)6C(gr) + 5H2(g) ↔ C6H10(g) ΔSototal = 733.441 J ΔSototal = -318.340 J ΔSototal = -733.441 J ΔSototal = 318.340 Jarrow_forward
- What is the total entropy change at 25oC for the reaction below, if the standard entropies of reactants and products are So (C(gr)) = 5.74 J/mol*K, So (H2(g)) = 130.68 J/mol*K, and So (C5H10(g)) = 347.7700 J/mol*K and the heat of formation of C5H10(g)) is -20.9300 kJ/mol.5C(gr) + 5H2(g) ↔ C5H10(g) ΔSototal = 264.095 J ΔSototal = -334.330 J ΔSototal = -264.095 J ΔSototal = 334.330 J Am i supposed to do something with the heat of formation? I used the formula and subtracted the products from the reactants and still got the wrong answer?arrow_forwardFor a chemical reaction the equilibrium constant was found to be K = 1.4 × 10–8 at T = 298.15 K, and the reaction entropy ΔrS0 = 258 J K–1 mol–1. Calculate the reaction enthalpy change, ΔrH0, for this reaction at 298.15K. Select one: 1. 123.4 kJ 2. 30.45 kJ 3. 121.7 kJ 4. 32.12 kJ 5. none of the other answersarrow_forwardThe protein lysozyme, an enzyme that breaks down bacterial cell walls, unfolds at a transition temperature of 75.5◦C and the standard enthalpy of transition ∆H⊖ - TRS was measured at +509 kJ mol−1.Calculate the standard entropy of transition. What is the significance of a positive ∆S TRSarrow_forward
- What is the standard reaction entropy, ΔS°rxn (in J/K), for the reaction given below? P4(s) + 6 F2(g) → 4 PF3(g) ΔS°rxn = ? S°m[P4(s)] = 41 J/mole·K S°m[F2(g)] = 203 J/mole·K S°m[PF3(g)] = 296 J/mole·Karrow_forwardDetermine the standard reaction entropy, in J/mol*K, for the reaction of aqueous sodium carbonate with hydrochloric acid. S values for the reactants and products are given below. NaCO(aq) + 2 HCl(aq) 2 NaCl(aq) + HO() + CO(g) = NaCO(aq) = 61.1HCl(aq) = 56.5NaCl(aq) = 115.5HO() = 70.0CO(g) = 213.8arrow_forwardWhat is the total entropy change at 25oC for the reaction below, if the standard entropies of reactants and products are So (C(gr)) = 5.74 J/mol*K, So (H2(g)) = 130.68 J/mol*K, and So (C7H16(g)) = 426.3000 J/mol*K and the heat of formation of C7H16(g)) is -187.9000 kJ/mol.7C(gr) + 8H2(g) ↔ C7H16(g)a) ΔSototal = -659.320 Jb) ΔSototal = 28.783 Jc) ΔSototal = -28.783 Jd) ΔSototal = 659.320 Jarrow_forward
- Chemistry & Chemical ReactivityChemistryISBN:9781133949640Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningChemistry: Principles and PracticeChemistryISBN:9780534420123Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward MercerPublisher:Cengage LearningChemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage Learning
- Chemistry: An Atoms First ApproachChemistryISBN:9781305079243Author:Steven S. Zumdahl, Susan A. ZumdahlPublisher:Cengage LearningChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage Learning