Given the thermodynamic properties below, determine the standard entropy change,AS', for the dissolution of calcium hydroxide. Give your answer to one decimal placein J/mol.Ca(OH)2 (s) =Ca2+ (aqg) + 2 OH (aq)S° (J/mol-K)H (kJ/mol) G (kJ/mol)Ca(OH)2 (s)83.4-986.1-898.6Ca2+ (ag) -53.1-542.8-553.6OH (aq)-10.8-230.0-157.2Your Answer:

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he standard entropy change, ancwor to ono ocimal nlace

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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Calculate AS for NH3(g). AS = i Use data in the table below: Substance Ag(s) AgCl(s) Al(s) Al₂O3(s) C(s) (graphite) CO(g) CO₂(g) CH₂(g) CH₂Cl(g) CH₂OH(1) C₂H₂(g) C₂H₂(g) C₂H6(g) CgH 18(1) C₂H₂OH(1) Standard Entropies of Some Typical Substances at 298.15 K Sᵒ (J mol-¹ K-¹) 40 76.1 Ca(s) CaCO3(s) SaCl₂(s) Sº (J mol-¹ K-¹) 42.55 96.2 28.3 51.0 186.2 234.2 126.8 CO(NH2)2(s) 104.6 CO(NH,)2(aq) 173.8 200.8 219.8 229.5 466.9 161 5.69 197.9 213.6 41.4 92.9 114 JK-1 Substance CaO(s) Ca(OH)₂ (s) CaSO4(s) 107 CaSO4+H₂O(s) 131 CaSO4-2H₂O(s) 194.0 223.0 27 90.0 130.6 188.7 Cl₂(g) Fe(s) Fe₂O3(s) H₂(g) H₂O(g) H₂O(l) HCI(g) HNO3(1) H₂SO4(1) HC,H,O,(D) Hg(1) Hg(g) K(s) KCl(s) K₂SO4(s) 69.96 186.7 155.6 157 160 76.1 175 64.18 82.59 176 Substance N₂(g) NH3(g) NH₂Cl(s) NO(g) NO₂(g) N₂O(g) N₂O4(g) Na(s) Na₂CO3(s) NaHCO3(s) NaCl(s) NaOH(s) Na₂SO4(s) 0₂(8) PbO(s) S(s) SO₂(g) SO3(g) Sº (J mol-¹ K-¹) 191.5 192.5 94.6 210.6 240.5 220.0 304 51.0 136 102 72.38 64.18 149.4 205.0 67.8 31.9 248.5 256.2
Use the observations about each chemical reaction in the table below to decide the sign (positive or negative) of the reaction enthalpy AH and reaction entropy AS. Note: if you have not been given enough information to decide a sign, select the "unknown" option. reaction observations conclusions AH is (pick one) The reverse of this reaction is always spontaneous but proceeds faster at A temperatures above 25. °C. AS is (pick one) v This reaction is spontaneous except below AH is (pick one) 63. °C but proceeds at a faster rate above 117. °C. AS is (pick one) v AH iS This reaction is always spontaneous, but proceeds faster at temperatures above (pick one) v C 115. °C. AS is (pick one)
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yo 9::11 %A) . Select True and False Statements öalg äbäi The standard entropy of an element is zero True False öslg äbäi The free energy is defined by G = H -TS False True The entropy change in an adiabatic reversible process is zero نقطة واحدة True False
Which statement best aligns with one of the three laws of thermodynamics? O AG--T(AS+AS) O AG-AU-PAV-TAS O AG-TAS O AG-T(AS-AS)