Thermodynamics Problem

  • Thread starter ashkash
  • Start date
  • #1
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Homework Statement



A closed system contains 3 kg of R-134a at 10 °C and 90 kPa (state 1), and undergoes an internally reversible, isothermal process until the volume of the R-134a reaches 0.056 m3 (state 2). The system returns to state 1 by an irreversible process and the heat transfer for the return process is +3.2 kJ. Determine Q12, W12, W21 and the entropy change for each process.


Homework Equations





The Attempt at a Solution



I do not know how to go about doing this. Any help will be appreciated. thanks.
 

Answers and Replies

  • #2
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Start out by drawing an T-s, P-V, and T-V diagram, to better see the cycle
 

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