On the P-v diagram, sketch the constant-temperature process through the state P = 280 kPa, v = 0.06 m3 /kg as pressure changes from P1 = 400 kPa to P2 = 200 kPa. Place the value of the temperature on the process curve on the P-v diagram.

Using the tables for water, determine the specified property data at the indicated states. (a) At p = 3 bar, v = 0.3 m³ /kg, find T in °C and u in kJ/kg. T = U = (b) At T = 320°C, v = p = U = V = h = °C P = kJ/kg = 0.034 m³ /kg, find p in MPa and u in kJ/kg. (c) At p = 28 MPa, T = 400 °C, find v in m³ /kg and h in kJ/kg. m³/kg h = MPa kJ/kg (d) At T = 10°C, v = 100 m³ /kg, find p in kPa and h in kJ/kg. kJ/kg kPa kJ/kg

An ideal gas is compressed from a volume of V, = 6.00 L to a volume of V, = 3.00 L while in thermal contact with a heat reservoir at T = 295 K as in the figure below. During the compression process, the piston moves down a distance of d = 0.145 m under the action of an average external force of F = 21.0 kN. (a) Find the work done on the gas. kJ (b) Find the change in internal energy of the gas. k) (c) Find the thermal energy exchanged between the gas and the reservoir. kJ (d) If the gas is thermally insulated so no thermal energy could be exchanged, what would happen to the temperature of the gas during the compression? O The temperature would decrease. O The temperature would remain constant. O The temperature would increase.

An ideal gas initially occupying 0.020 m3 at 1.0 MPa is quasistatically expanded inside a piston-cylinder device at a constant pressure until its volume doubles. Next the expansion is continued at constant volume till the pressure reaches half of the initial pressure. Finally it is brought back to the initial state in a polytropic process with exponent n=1.6 a) Draw the processes on a P-v diagram and calculate the total work. b) Calculate the total heat transfered, what is the difference between the initial and final temperature?