Can you answer for me ?✨ (1) Steam at a temperature of 250°C has a specific volume of 0.15436m/kg. What are the pressure, specific internal energy, enthalpy, and entropy? Ans. 1.48 MPa, 2696 kJ/kg, 2924.2 kJ/kg, 6.717 kJ/kg•K
Can you answer for me ?✨
(1) Steam at a temperature of 250°C has a specific volume of 0.15436m/kg. What are the pressure, specific internal energy, enthalpy, and entropy?
Ans. 1.48 MPa, 2696 kJ/kg, 2924.2 kJ/kg, 6.717 kJ/kg•K
(2) Steam at a pressure of 3.5 MPa is known to have a specific volume of 50x10-3 m3/kg. What is its specific enthalpy
Ans. 2581.39 kJ/kg
(3) A rigid vessel contains 2 kg of steam at 6.35 MPa and 375°C. Determine its enthalpy in kJ using steam tables only.
Ans. 6208.15 kJ
(4) A tank contains exactly one kilogram of water consisting of liquid and vapor in equilibrium at 1 MPa. If the liquid and each occupy one-half the volume of the tank, what and vapor is the enthalpy of the contents of the tank?
Ans. 774.4 kJ/kg
(5) Steam at a temperature of 210°C has a specific entropy of 7.1167 kJ/kg•K. Determine the pressure, internal energy, enthalpy and volume.
Ans. 0.49 MPa, 2877.3 kJ/kg, 2659.7 kJkg, 0.4467 m3/kg
(6) Saturated steam vapor at 250°C moves along its isothern until the pressure becomes 1 MPa. Locate the end state points on the Mollier chart and for each kilogram of steam processed determine (a) the initial pressure, (b) the change of enthalpy, and (c) the change of entropy.
Ans. (a) 4 MPa, (b) 144 kJ/kg, (c) 0.90 kJ/kg•K
(7) Steam undergoes an isentalpic (h = C) process from 1.5 Mpa, 350°C to 10 MPa. Find the final temperature using the Mollier chart.
Ans. 418°C
(8) Consider 1 kg of water that is heated at constant pressure (0.50 MPa) from a wet state (x1 = 8%) to 400°C. Locate the end state points on the Mollier chart and determine (a) the change of enthalpy and (b) the change of entropy.
Ans. (a) 739 kJ/kg, (b) 1.70 kJ/kg
Thank you in advance ❣️❣️
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