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    A piston-cylinder device contains 0.8kg of steam at 300 degr

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    A piston-cylinder device contains 0.8kg of steam at 300 degrees C and 1 MPa. Steam is cooled at constant pressure until one-half of the mass condenses.

    (a) Show the process on a T-v diagram.
    (b) Find the final temperature
    (c) Determine the volume change.

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    Solution
    a. At 1 MPa, the saturated temperature is 180 0C (see saturated steam table). This means we have superheated steam for a start. When steam is cooled at constant pressure, its volume has to reduce to offset the change in ...

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