Thermodynamics Problem Solving | ESEN 213

1. A piston-cylinder device initially contains 50 L of liquid water at 40°C and 200 kPa. Heat is transferred to the water at constant pressure until the entire liquid is vaporized.
  • What is the mass of the water?
  • What is the final emperature?
  • Determine the total enthalpy change.
2. Piston–cylinder device contains 0.005 m3 of liquid water and 0.9 m3 of water vapor in equilibrium at 600 kPa. Heat is transferred at constant pressure until the temperature reaches 260°
  • (a) What is the initial temperature of the water?
  • (b) Determine the total mass of the water.
  • (c) Calculate the final volume.
 3. A 0.016773-m3 tank contains 1 kg of refrigerant-134a at 110°C. Determine the pressure of the refrigerant, using
  • (a) the ideal-gas equation
  • (b) the generalized compressibility chart
  • (c) the refrigerant tables.
4. A 1-m3 tank contains 2.841 kg of steam at 0.6 MPa. Determine the temperature of the steam, using
  • (a) the ideal gas equation
  • (b) the van der Waals equation

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