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Homework Help: Question on energy and exergy analysis.

  1. Jan 31, 2014 #1
    1. The problem statement, all variables and given/known data

    A frictionless piston cylinder device contains a saturated liquid-vapor mixture at 100 °C. During a constant pressure process 600 kJ of heat is transferred to the surroundings which is at 25°C. As a result, part of the water vapor contained in the cylinder condenses.

    2. Relevant equations
    Q-Wb = mΔu

    3. The attempt at a solution

    If I wanted to find out the properties of the water how can I do so if they only gave me 1 intensive property, and I don't know how to use the first law since there is boundary work (?) that I can't figure out how much since ΔV is unknown.
  2. jcsd
  3. Feb 3, 2014 #2
    I am afraid it is unclear what is being solved for...
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