Question: Use data in Table 4H.1 or Appendix 2A to calculate the standard reaction entropy for each of the following reactions at 25C. For each reaction,

Use data in Table 4H.1 or Appendix 2A to calculate the standard reaction entropy for each of the following reactions at 25°C. For each reaction, interpret the sign and magnitude of the reaction entropy.

Table 4H.1
2A THERMODYNAMIC DATA AT 25 C Inorganic Substances Substance Aluminum Al(s) Al+ (aq) AI(OH)3(s) AlO3(s)

(a) The formation of 1.00 mol H₂O(l) from the elements in their most stable state at 298 K and 1 bar.

(b) The oxidation of 1.00 mol CO(g) to carbon dioxide.

(d) The decomposition of potassium chlorate: 4 KClO₃(s) → 3 KClO₄(s) + KCl(s).

2A THERMODYNAMIC DATA AT 25 C Inorganic Substances Substance Aluminum Al(s) Al+ (aq) Al(OH)3(s) AlO3(s) AICI, (s) AlBr,(s) Antimony Sb(s) SbH3(g) SbCl3(g) SbCls (g) Arsenic As(s), gray AsO (aq) A$2S3(S) Barium Ba(s) Ba+ (aq) BaO(s) BaCO3(s) BaCO3(aq) Molar mass, M/(g.mol-) 26.98 26.98 78.00 101.96 133.33 266.68 121.76 124.78 228.11 299.01 74.92 138.92 246.05 137.33 137.33 153.33 197.34 197.34 Enthalpy of formation, AH/(kJ-mol-) 0 -524.7 -1276 -1675.7 -704.2 -527.2 0 +145.11 -313.8 -394.34 0 -888.14 - 169.0 0 -537.64 -553.5 -1216.3 - 1214.78 Gibbs free energy of formation, AG/(kJ.mol-) 0 -481.2 -1582.35 -628.8 0 +147.75 -301.2 -334.29 0 -648.41 -168.6 0 -560.77 -525.1 -1137.6 -1088.59 Molar heat capacity, Cr.m/(J.K-mol). 24.35 79.04 91.84 100.6 25.23 41.05 76.69 121.13 24.64 116.3 28.07 47.78 85.35 Molar entropy,* Sm/(J-K-mol-) 28.33 -321.7 - 50.92 110.67 180.2 45.69 232.78 337.80 401.94 35.1 - 162.8 163.6 62.8 +9.6 70.42 112.1 -47.3

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