At the initial state, the pressure and temperature of water vapor in the metal tank were 20 MPa, 520 °C. The water vapour has cooled to 400 °C. Using the compressibility chart, determine (a) The...

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Extracted text: At the initial state, the pressure and temperature of water vapor in the metal tank were 20 MPa, 520 °C. The water vapour has cooled to 400 °C. Using the compressibility chart, determine (a) The specific volume of the water vapor in m/kg at the initial state. (b) The pressure in MPa at the final state.