Departure Functions: ConcepTest and Example Problem

Try to answer this ConcepTest and solve the example problem before using this module. Studies show that trying to answer the questions before studying material improves learning and retention. We suggest that you write down the reasons for your answers. By the end of this module, you should be able to answer these on your own. Answers will be given at the end of this module.

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Example Problem 1

A vapor with an ideal gas heat capacity of 45 J/mol-K is expanded across a well-insulated throttling valve. The vapor enters at 2.5 MPa and 600 K and exits at 0.10 MPa and 520 K. Using this information, evaluate the enthalpy departure function at the inlet conditions.