Consider the following thermodynamic data for the reaction shown above. NH2 + HX + :NEN: AH°r (kJ/mol) -386 260.1 30.00 -393.5 S° (J/mol K) 166 146.0 191.3 191.5 213.8 D. Based on the reaction equation given above, does entropy increase or decrease in this reaction? E. Justify your answer to (D) with a calculation. Does your calculation agree with your prediction? F. Is this reaction thermodynamically favorable at 25°C? Justify with a calculation. +

Consider the following thermodynamic data for the reaction shown above. NH2 + HX + :NEN: AH°r (kJ/mol) -386 260.1 30.00 -393.5 S° (J/mol K) 166 146.0 191.3 191.5 213.8 D. Based on the reaction equation given above, does entropy increase or decrease in this reaction? E. Justify your answer to (D) with a calculation. Does your calculation agree with your prediction? F. Is this reaction thermodynamically favorable at 25°C? Justify with a calculation. +

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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1:44 1 LTE 4 1 Search Question 20.b of 23 Show Answer Consider the reaction Cl2(g) + Br2(g) → 2 BrCI(g) at 25 °C. Which of the following best explains why the change in entropy is so small? A) All of the components in the chemical equation are gases. B) There are the same moles of gas on both sides of the reaction. C) The temperature of the reaction does not change. Tap here or pull up for additional resources
Which reaction below has a positive change in entropy? O 2 N20 (g) --> 2 N2 (g) O2 (e) O N2 (g) + 3 H2 (g) -- 2 NH3 (g) O 2 KCIO3 (s) --> 2 KCI (s) + 3 O2 (g) O 2 H2 (e) C2H2 (g)--> C2H, (g).
1. Please consider 0.15 gm of Constantan (a Cu/Ni alloy widely used in thermocouples, c = 390 J/•K-kg) that cooled through exposure to the laboratory atmosphere (T 22 •C) from 620 C to 20 C. a. Please determine the change in entropy of the Constantan (in J/ K- kg). b. Please determine the change in entropy of the laboratory atmosphere (in J/ K-kg). c. Please determine the change in entropy of the universe (in J/ K-kg). %3D
Use the following table to calculate ArH°, AS°, & A,Gº for the following reaction at 298K, then calculate it for -32°C and 250°C. 3 H₂ (g) + N₂(g) → 2 NH³(g) H₂(g) N₂(g) NH3(g) S°(J/K mol) 130.7 191.6 192.8 Which temperature(s) make the reaction spontaneous? AH (Kj/mol) 0 0 -45.9
The change in entropy, ΔSrxn∘, is related to the change in the number of moles of gas molecules, Δngas. Determine the change in the moles of gas for each of the reactions and decide if the entropy increases, decreases, or has little or no change. A. C(s)+H2O(g) ⟶ CO(g)+H2(g) Δ?gas= ? The entropy, ΔSrxn∘, 1) has little or no change 2) increases 3) decreases B. H2O2(l) ⟶ H2(g)+O2(g) Δ?gas=? The entropy, ΔSrxn∘, 1) has little or no change 2) increases 3) decreases C. C2H2(g)+3O2(g) ⟶ 2CO2(g)+2H2O(l) Δ?gas=? The entropy, ΔSrxn∘, 1) has little or no change 2) increases 3) decreases D. PCl5(s) ⟶ PCl3(l)+Cl2(g) Δ?gas=? The entropy, ΔSrxn∘, 1) has little or no change 2) increases 3) decreases
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For the decomposition of mercury(II) oxide, HgO, to mercury and oxygen:What is the standard change in entropy for this reaction? 2HgO(s) 2Hg(l) + O2(g) So / J∙mol–1∙K–1 HgO(s) 70.29 Hg(l) 76.02 O2(g) 205.14 a. 210.87 J∙K –1 b. 216.60 J∙K –1 c. 351.45 J∙K –1 d. 58.83 J∙K –1
11. For which of the following reactions will the entropy of the system decrease?A. 2 NH3(g)  N2(g) + 3 H2(g)B. 2 C(s) + O2(g)  2 CO(g)C. CaCO3(s)  CaO(s) + CO2(g)D. 2 NO2(g)  N2O4(g)E. NaOH(s)  Na+(aq) + OH–(aq)
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8. You have discovered a new polymer. A monomer is shown below. To better understand its behavior you calculate its theoretical entropy. With careful measurements you find that it can be in 3 positions around the 1st bond in the chain, 2 around the 2nd bond, 1 around the 3rd bond and 3 around the 4th bond. Further, the ring can be in 4 different positions. What is the entropy in units of KB?
From this reaction 2NO(g) + 2H2(g) à N2(g) + 2H2O(1), NO H2 N2 Sᵒ (J/mol K) 75.10 191.5 192.3 AH'f -283.74 0 0 (kJ/mol) What is the entropy change (in J/K) of the system? H2O 189.0 -373.57