The Jаnus-fаced nаture оf human sоciety refers tо:
Refer tо the chemicаl structure prоvided belоw. Whаt is the systemаtic IUPAC name for this structure?
Prоblem 1 (50 pts) A rigid tаnk with vоlume Vtаnk = 2 m3 is filled with аir that is initially at a pressure оf P1 = 500 kPa and a temperature of T1 = 1000 K. Model the air in the tank as an ideal gas with R = 287 N-m/kg-K, cP = 1005 J/kg-K, and cv = 718 J/kg-K. The valve is opened and air is allowed to escape from the tank through a nozzle with an efficiency of 75% that exhausts to Patm = 100 kPa. The pressure downstream of the valve, entering the nozzle, is maintained at Pn,in = 150 kPa during this process and the process stops when the pressure in the tank reaches P2 = Pn,in = 150 kPa. Heat transfer from a thermal reservoir at TH = 1200 K keeps the temperature in the tank constant (at 1000 K) during this process. You may neglect the kinetic energy of the air entering the nozzle. a.) What is the mass of air that is initially in the tank (kg)? b.) What is the mass of air that leaves the tank and passes through the nozzle during this process (kg)? c.) What is the heat transfer to the tank during this process (kJ)? d.) What is the velocity of the air leaving the nozzle (m/s)? e.) What is the entropy generated inside the system shown below (J/K)? Note that the system stops at the exit of the nozzle. Problem 2 (50 pts) The figure below illustrates a Rankine cycle using water that has a single, closed feedwater heater. The cycle uses heat from a high temperature source at TH = 800°C and rejects heat to the atmosphere at TC = 20°C. Some of the properties at the states in the cycle are shown in the table below. The working fluid for the cycle is water – if you need any additional properties use your water tables. a.) Determine the fraction of the steam extracted after the high pressure turbine (f). b.) Determine the specific enthalpy of the water entering the boiler (kJ/kg). For the remainder of the problem, assume that f = 0.15 and h1 = 700 kJ/kg (these may or may not be the correct answers). c.) Determine the efficiency of the power plant (%). d.) Determine the back work ratio of the power plant (%). e.) If the power plant produces a net work transfer of = 3000 kW then what is the mass flow rate passing through the boiler (kg/s). f.) What is the effectiveness of the boiler (%)? g.) What is the efficiency of the low pressure turbine (%)? Ideal gas entropy-1.pdf Water Tables-2.pdf I certify that I completed this test without help.