Superheated vapor at 1.4 MPa and 250 o C is allowed to cool at constant volume until the temperature drops to 120 o C. At the final state, determine (a) the pressure, (b) the quality and (c) the enthalpy. Also, show the process on T‐v diagram with respect to saturation lines
Superheated vapor at 1.4 MPa and 250 o C is allowed to cool at constant volume...
Water initially at 300 kPa and 250°C is contained in a constant-volume tank. The water is allowed to cool until its pressure is 150 kPa. On the P-vand T-v diagrams, sketch, with respect to the saturation lines, the process curve passing through both the initial and final states of the water. Label the end states on the process curve. Also, on both the P-vand T-v diagrams, sketch the isotherms passing through both states and show their values, in °C, on...
A piston–cylinder device contains steam initially at 1 MPa, 450°C. Steam is allowed to cool at constant pressure until it becomes saturated vapor. Find the internal energy (u) on the initial and final states. Find the specific volume (v) on the initial and final states. Find the boundary work associated with the transformation. Write the conservation of energy equation, and simplify it. Deduce the amount of heat transferred per unit mass. Represent the process on P-v diagram, showing the saturation...
1. A piston-cylinder device contains steam initially at 1.2 MPa, 500°C, and 2.8 m' Steam is al to cool at constant pressure until it first starts condensing (a) Show the process on a saturation lines and determine (b) the mass of the steam, (e) the final diagrams with respect to temperature, and (d) the amount of heat and work transfer (25 marks) 1. A piston-cylinder device contains steam initially at 1.2 MPa, 500°C, and 2.8 m' Steam is al to...
A piston-cylinder device contains 5 kg of saturated water liquid at 0.3 MPa. Heat is transferred at constant pressure until the temperature reaches 500 -C. (84 marks) a) What is the initial temperature of the system? b) What is the initial quality x? c) What is the initial specific enthalpy of the system? d) What is the final state? e) Show the process on a P-v diagram with respect to the saturation line. 1) What is the final specific enthalpy?...
1. Refrigerant 134a enters the compressor of a refrigerator as superheated vapor at 0.20 MPa and -10 °C at a rate of 0.07 kg/s, and it leaves at 1.2 MPa and 70 °C. The refrigerant is cooled in the condenser to 44 °C and 1.130 MPa and it is throttled to 0.20 MPa. Disregarding heat transfer and pressure drop in the connecting lines between the components, show the cycle on a T-s diagram with respect to the saturation line. Determine...
A piston-cylinder device contains 10 kg of saturated water liquid at 0.4 MPa. Heat is transferred at constant pressure until the temperature reaches 400 °C. (68 marks) a) Show the process on a P-v diagram with respect to the saturation line? b) What is the initial temperature of the system? c) What is the initial quality x? d) What is the initial specific enthalpy of the system? e) Determine the initial total volume of the system. f) What is the...
Problem 5- A piston-cylinder device initially contains steam at 3.5 MPa, superheated by .10°C. Now, steam loses heat to the surroundings and the piston moves down, hitting a set of stops, at which point the cylinder contains saturated liquid water. The cooling continues until the cylinder contains water at .200C. Determine the initial temperature of the steam a. b. Sketch the process on a P-v an T-v diagram Determine the initial specific enthalpy, in kJ/kg d. Determine the enthalpy change...
QUESTION 2 A piston-cylinder device contains 5 kg of saturated water liquid at 0.3 MPa. Heat is transferred at constant pressure until the temperature reaches 500 °C. (84 marks) What is the initial temperature of the system? b) What is the initial quality x? c) What is the initial specific enthalpy of the system? d) What is the final state? e) Show the process on a P-v diagram with respect to the saturation line. 1) What is the final specific...
laborate wed Victoria University ve NEM2201 THERMODYNAMICS 1 Writing time - 50 minutes Session 3 test QUESTION 1 a) What are extensive and intensive properties? Give some examples (4 marks) b) What are the isothermal and isobaric processes? (4 marks) c) What are the qualities x for saturated liquid and saturated vapor, respectively? (4 marks) d) What is the difference between saturated vapor and superheated vapor? (4 marks) QUESTION 2 A piston-cylinder device contains 5 kg of saturated water liquid...
QUESTION 2 A piston-cylinder device contains 5 kg of saturated water liquid at 0.3 MPa. Heat is transferred at constant pressure until the temperature reaches 500 °C. (84 marks) a) What is the initial temperature of the system? b) What is the initial quality x? c) What is the initial specific enthalpy of the system? d) What is the final state? e) Show the process on a P-v diagram with respect to the saturation line. f) What is the final...