The molar heat capacities for solid, liquid, and gaseous molecular Cl₂ can be written in the following general form, where the coefficients a, b, c and d are given in the table below. Phase solid liquid gas T Range (in K) 15-172.12 172.12-239.0 > 239.0 Note: Cpº R = a +bT+cT² +dT³ a -1.545 7.689 3.812 b (in K-¹) 0.1502 0.005582 0.001220 c (in K-²) -0.001179 -1.954 x 10-5 - 4.856 x 10-7 d (in K-³) 3.441 x 10-6 Tfus = 172.12 K AfusH = 6.406 kJ/mol Tvap = 239.0 K AvapH = 20.40 kJ/mol (a) Use this data to find the entropy content (in J/K) for molecular chlorine at 200 K, if the absolute entropy at 15 K is 1.401 J/K. (b) What is the change in enthalpy, AH (in kJ), if one mole of Cl₂ is heated from 200 to 250 K?

The molar heat capacities for solid, liquid, and gaseous molecular Cl₂ can be written in the following general form, where the coefficients a, b, c and d are given in the table below. Phase solid liquid gas T Range (in K) 15-172.12 172.12-239.0 > 239.0 Note: Cpº R = a +bT+cT² +dT³ a -1.545 7.689 3.812 b (in K-¹) 0.1502 0.005582 0.001220 c (in K-²) -0.001179 -1.954 x 10-5 - 4.856 x 10-7 d (in K-³) 3.441 x 10-6 Tfus = 172.12 K AfusH = 6.406 kJ/mol Tvap = 239.0 K AvapH = 20.40 kJ/mol (a) Use this data to find the entropy content (in J/K) for molecular chlorine at 200 K, if the absolute entropy at 15 K is 1.401 J/K. (b) What is the change in enthalpy, AH (in kJ), if one mole of Cl₂ is heated from 200 to 250 K?

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter9: Liquids, Solids, And Materials

Section: Chapter Questions

Problem 45QRT: At the critical point for carbon dioxide, the substance is very far from being an ideal gas. Prove...

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