Q2- Consider two ways to compress 2 kg/s of air (an ideal gas with R = 0.287 kJ/kg-K and constant heat capacities: cv = 0.718 kJ/kg-K, and cp = 1.005 kJ/kg-K) from an inlet Pin = 100 kPa and Tin = 20°C to an outlet Pout = 50 MPa and a heat loss of 150 kW. In this case the outlet temperature is %3D Tout =700°C. Find the work in this case

Define the energy equation of a uniformflow system reduces to that of a closed system when all the inlets and exits are closed.

Please solve quickly.

A turbine is driven by a system that enters the turbine at the ff. conditions: 500 kg/h, 44 atm, 450 deg C, 60 m/s linear speed. The steam exits at a point five meters below the inlet stream of the turbine with the following conditions: atmospheric pressure, 360 m/s speed. 70,000 W of shaft work is delivered by the turbine while 104 kilocalories/h heat is lost. Here are the questions to be answered: 1. Why is the value of Wexp 0? (Explain) 2. Given the above values, can you calculate the Wflow? (Yes/No)

3- Two tanks are connected as shown in Figure, both containing water. Tank A is at 200 kPa, v = 0.5 m/kg, VA =1m, and tank B contains 3.5 kg at 0.5 MPa and 400•C. The valve is now opened and the two tanks come to a uniform state. Find the final specific volume. B Ans. 0.5746 m3/kg

Example A 5-hp fan is used in a large room to provide for air circulation. Assuming a well-insulated, sealed room determine the internal energy increase after 1h of operation.

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.