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The standard entropy of Pb(s) at 298.15 K is 64.80 J KL mol. Assume that the heat capacity of Pb(s) is given by: Cpm(s) Jmol-¹K- = 22.13 +0.011727(K-¹) +1.00 × 10-572(K-2) The melting point is 327.4°C, and the heat of fusion under these conditions is 4770 J mol¹. Assume that the heat capacity of Pb(/) is given by Cpm(1) Jmol-1K-1 = 32.51 -0.00301 7(K-¹) a) Calculate the standard entropy of Pb(l) at 850°C b) Calculate AH for the transformation of Pb(s,25°C) → Pb(/, 850°C)

The standard entropy of Pb(s) at 298.15 K is 64.80 J KL mol. Assume that the heat capacity of Pb(s) is given by: Cpm(s) Jmol-¹K- = 22.13 +0.011727(K-¹) +1.00 × 10-572(K-2) The melting point is 327.4°C, and the heat of fusion under these conditions is 4770 J mol¹. Assume that the heat capacity of Pb(/) is given by Cpm(1) Jmol-1K-1 = 32.51 -0.00301 7(K-¹) a) Calculate the standard entropy of Pb(l) at 850°C b) Calculate AH for the transformation of Pb(s,25°C) → Pb(/, 850°C)

Principles of Modern Chemistry
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter13: Spontaneous Processes And Thermodynamic Equilibrium
Section: Chapter Questions
Problem 22P: Use data from Appendix D to calculate the standardentropy change at 25°C for the reaction...
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The standard entropy of Pb(s) at 298.15 K is 64.80 J K mol¹. Assume that the heat capacity of Pb(s) is given by: Cpm(s) = 22.13 +0.011727(K-¹) +1.00 x 10-5T²(K-²) Jmol-¹K-1 The melting point is 327.4°C, and the heat of fusion under these conditions is 4770 J mol¹. Assume that the heat capacity of Pb(/) is given by Cpm(1) = 32.51 -0.00301 T(K-¹) Jmol-1K-1 a) Calculate the standard entropy of Pb(l) at 850°C b) Calculate AH for the transformation of Pb(s,25°C) → Pb(/, 850°C)
Transcribed Image Text:The standard entropy of Pb(s) at 298.15 K is 64.80 J K mol¹. Assume that the heat capacity of Pb(s) is given by: Cpm(s) = 22.13 +0.011727(K-¹) +1.00 x 10-5T²(K-²) Jmol-¹K-1 The melting point is 327.4°C, and the heat of fusion under these conditions is 4770 J mol¹. Assume that the heat capacity of Pb(/) is given by Cpm(1) = 32.51 -0.00301 T(K-¹) Jmol-1K-1 a) Calculate the standard entropy of Pb(l) at 850°C b) Calculate AH for the transformation of Pb(s,25°C) → Pb(/, 850°C)
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