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Unformatted text preview: ChBE 321 – Chemical Engineering Thermodynamics Exam #2 – March 12, 2008 1 Name:__________________________________________________ 2:00 PM-2:50 PM Answer all questions in this answer sheet. You will have 50 minutes to complete this exam. Ask for clarification if a question is unclear. This exam is open notes and open textbook. There are three questions on this exam. Inspect exam to ensure it is complete. ChBE 321 – Chemical Engineering Thermodynamics Exam #2 – March 12, 2008 2 Problem 1. Calculate the change in entropy when one mole of water undergoes the following irreversible change in state (30 Points): H B 2 B O (liquid, 104°C, 1.00 bar) b H B 2 B O (gas, 104°C, 1.00 Bar) Hint: First devise a reversible path to go from the initial to the final state. Given values/constants: Δ H for the vaporization of liquid water is 40,508 J/mol at 100°C The molar heat capacity of H B 2 B O (liquid) is 75.3 J/K and is independent of T The molar heat capacity of H B 2 B O (gas) is 37.5 J/K and is independent of T O (gas) is 37....
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- Spring '08
- Thermodynamics, Chemical Engineering Thermodynamics, Engineering Thermodynamics Exam