Q2. Determine the phase in a system consisting of water at the following conditions and sketch T-v diagrams showing the location of each state. (Label the value P, Tsat, Vr and vg on diagram) a. p=5 bar, v=0,001 m² /kg

3. Find the internal energy of water at the given states for 6 MPa and determine: T,°C U, KJ/Kg Phase Description saturated vapor State 1 State 2 saturated liquid saturated liquid saturated vapor state 3 + 0.95 state 4 500°C state 5 100°C state 6 T= 460°C a- The internal energy b-and the phase descriptions in the following table for water.

A PV diagram below, Figure 1, shows two possible states of a system containing three moles of a monatomic ideal gas. (P,= P2 = 450 Pa, V, = 2m', V,= 8m²) c. Draw the process which depicts an isothermal expansion from state 1 to the volume V, followed by an isochoric increase in temperature to state 2 and label this process (B). d. Find the change in internal energy of the gas for the two-step process (B) Figure 1 (N/m²) 500 ! 400+ 300+ 200+ 100 - + + + + 4 6. 8 10 V (m³) 2 Copyright © 2005 Pearson Prentice Hall, Inc.

A piston-cylinder device containing 2kg of saturated H20 at 187 °C has initial specific volume of 0.13 kg/m³. The H20 is then expanded to a pressure of 300 kPa and a temperature of 187 °C. Fill in the following chart of properties for each state, and plot the two states on the given graph. Show all your work on this sheet or the next. State 1 Property P (kPa) State 2 300 T (°C) v (m³/kg) u (kJ/kg) x (phase or quality) 187 187 0.13 V