Determine the volume occupied by 10 kg water at a pressure of 10 MPa and a temperature of (a)5"C, (b)200 "C, (c) 400 "C, (d)800 "C, (e) 1500 "C, and (f)-10 "C. Ans. (a)0.00996 m3 (b)0.0115 m3 (c) 0.2641 m3 (d)0.4859 m3 (e)0.8182 m3 (f)0.01089 m3
Two kg of steam at a quality of 0.80 is contained in the volume shown (Fig. 2-8). A spring is then brought in contact with the top of the piston and heat is added until the temperature reaches 500°C. Determine the final pressure. (The force in the spring is Kx, where x is the displacement of the spring. This results in a trial-and-error solution.) Ans. 220 kPa
Two kg of water is contained in a piston-cylinder arrangement by a 16 000-kg, 2-m-diameter, frictionless piston. See Fig. 2-1. Heat is added until the temperature reaches (a) 400 "C, (b)650 "C, and (c) 140 "C. Calculate the final volume. Ans. (a) 4.134 m3 (b)5.678 m3 (c) 2.506 m3
Steam with a quality of 0.85 is contained in a rigid vessel at a pressure of 200 kPa. Heat is then added until the temperature reaches (a)400 "C and (b)140 "C. Determine the final pressures. Ans. (a) 415 kPa (h)269 kPa
A rigid vessel with a volume of 10 m3 contains a water-vapor mixture at 400 kPa. If the quality is 60 percent, find the mass. The pressure is lowered to 300 kPa by cooling the vessel; find mKand m,. Am. 35.98 kg. 16.47 kg, 19.51 kg
Determine the final volume of a mixture of water and steam if 3 kg of water is heated at a constant pressure until the quality is 60 percent. The pressure is (a)25 kPa and (b)270 kPa.
Ans. (a) 11.6 mZ (h)1.24 m3