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Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Question
Predict the algebraic sign of the entropy change for the following reactions.
- PCl3(g) + Cl2(g) → PCl5(g)
- CO2(g) + H2O(l) → H2CO3(aq)
- 3Mg(s) + 2N2(g) → Mg3N2(s)
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- State whether the sign of the entropy change expected for each of the following processes will be positive or negative, and explain your predictions. 2HgO(s) + 2Hg(l) → O2(g) H2(g) → 2H(g)arrow_forwardConsider the combustion of propane gas: C3H8(g) + 5O2(g) ------> 3CO2(g) + 4H2O(g) ΔHrxn = - 2044 kJ Determine the sign of the entropy change for the system.arrow_forwardMethanol is relatively inexpensive to produce. Much consideration has been given to using it as a precursor to other fuels such as methane, which could be obtained by the decomposition of the alcohol. CH3OH(l) -> CH4(g) + 1/2 O2(g) (a) What are the sign and magnitude of the entropy change for the reaction? Does the sign of Δarrow_forward
- For each of the following reactions determine if the change in entropy was positive or negative:A) Water at 40°C → Water at 25°CB) 2NO2(g) → N2O4(g)C) CH3OH (l) → CH3OH (g)D) PbCl2(s) → PbCl2(aq)arrow_forwardDoes the entropy increase or decrease in these reactions? Why? a) 4 Al + 3 O2 → 2 Al2O3 b) C + 2 Cl2 → CCl4 c) H2O (l) → H2O (g) d) CCl4 → C + 2 Cl2arrow_forwardCalculate the standard entropy change for the following reaction. 4 Al(s) + 3 O2(g) → 2 Al½O3(s) JK-!arrow_forward
- Consider entropy and its role in determining if chemical and physical processes are spontaneous. For any process to be spontaneous, what must happen to the entropy of the universe during that process? Acetone will spontaneously vaporize when coming in contact with your skin even though acetone has a much higher boiling point. Explain how this occurs in light of your answer to part (a).arrow_forward3. What change will increase the entropy of the system? Group of answer choices liquid to solid solid to gas gas to liquid gas to solid 2.ΔSsyst>0 for the following reaction: Group of answer choices A, 2NO (g) + O2(g) → 2NO2(g) B, HCl (g) + NH3(g) → NH4Cl (s) C, C3H8(g) + 5 O2(g) → 3CO2 (g) + 4 H2O (g) D, 2N2 (g) + 3H2(g) → 2NH3(g) E, Pb2+(aq) + 2Cl-(aq) → PbCl2 (s)arrow_forwardUse the data to calculate the standard entropy change for the following reaction: 5. S°[Mt(s)] 43.2 J/K mol Mt(s) + ½ O2(g) → MtO(s) S°[O2(g)] = 305.1 J/K-mol S°[MtO(s)] 62.6 J/K mol a) -133.2 J/K b) -285.7 J/K c) 285.7 J/K d) 133.2 J/Karrow_forward
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