4 Fe 3 0, 2 Fe,O3 AS° sys = - 225 J/K + AH° 0.0 0.0 -98.3 kJ/mol What is AS°uniy if AS° sys = - 225 J/ K at 298 K temp ? 435 J / K spontaneous 166 J / K spontaneous 166 J / K nonspontaneous - 435 J / K nonspontaneous

4 Fe 3 0, 2 Fe,O3 AS° sys = - 225 J/K + AH° 0.0 0.0 -98.3 kJ/mol What is AS°uniy if AS° sys = - 225 J/ K at 298 K temp ? 435 J / K spontaneous 166 J / K spontaneous 166 J / K nonspontaneous - 435 J / K nonspontaneous

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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17. For the reaction: A + B C AH°= +45 kJ/mol and AS° = +60 J/K.mol. At what temperature will this reaction be spontaneous? * O The reaction is nonspontaneous at all temperatures. O At a temperature greater than 477 °C. O The reaction is spontaneous at all temperatures. O At a temperature greater than 750 °C. O At a temperature lower than 477 °C.
Chemistry Above what temperature does the following reaction become non-spontaneous? 2 H₂S(g) + 3 O₂(g) → 2 SO₂(g) + 2 H₂O(g) AH = -1036 kJ; AS = -153.2 J/K O 158.7 K This reaction is nonspontaneous at all temperatures. O 298 K This reaction is spontaneous at all temperatures O 6.762 × 103 K
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1
At what temperatures will the following processes be spontaneous? ΔH= -18 kJ and ΔS= 65 J/K
For the reaction: 20PCI3(g) 2PCI3(1) + 02(g) AH° = 508 kJ-mol-1 and AS° = 178 J-mol-1.K-1 at 298 K. Which of the following statements is true? Periodic Table and Datasheet O The reaction is spontaneous at all temperatures. O The reaction is spontaneous at high temperatures. O The reaction is spontaneous at low temperatures. O The reaction is not spontaneous at any temperature.
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6. If for a spontaneous generic process A→B, ΔG > ΔH, then for this process___________ Group of answer choices A, ΔS<0 if ΔH>0 and ΔS>0 if ΔH<0 b, ΔS<0, always c, ΔS=0 d, ΔS>0 if ΔH>0 and ΔS<0 if ΔH<0 e, ΔS>0, always 7.Consider a generic reaction AB (g) → A (g) +B (g) for which ΔH° is -150 kJ/mol and ΔS° is -150 J/K ∙ mol. This reaction is ________ Group of answer choices A, spontaneous at only at low temperatures B.spontaneous only at high temperatures C. nonspontaneous at all temperatures D. spontaneous at all temperatures
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