3. [3 Consider a Rankine cycle with reheat as shown in the diagram, with state properties as specified in the table. Ignore kinetic and potential energy effects. a. Sketch this cycle on a T-s diagram (label all states). Label each process (such as pump, condenser, etc.) on the T-s diagram. Determine the work from the high- pressure turbine per mass flow rate, in Btu/lb. b. C. d. 10] Determine the thermal efficiency of the cycle. Find the isentropic turbine efficiency for the high-pressure turbine. e. State 1 2 3 4 5 6 Pressure (psi) 1400 100 100 1 1 1400 Quality Superheated steam Superheated steam Superheated steam 0 Compressed liquid Temperature (°F) 1300 600 900 101.7 101.7 101.7 Qin Enthalpy (Btu/lb) 1669.6 1329.3 1480.5 1105.8 69.74 73.918 Reheat section mus W₂ High- pressure- turbine Steam generator Pump Entropy (Btu/lb.°R) 1.7192 1.7582 1.8838 2 1.9779 0.1327 0.1327 Condenser Low-pressure turbine Lout

1. thermodynamics

The molar heat capacities of substances varies with temperature. The general function for determining the molar heat capacity is given below; Cp = ( a + b T + c T 2 )R . In case of a gas where a = 3.245, b = 7.108 x10 ^-4 K ^-1 , and c = -4.06 x10^ -8 K ^-2 for temperatures in the range of 300 Kelvins to 1,500 Kelvins. What is the heat capacity (in Joules per Kelvin per mole) of this gas at 1,500 kelvins? NOTE: Express answer in THREE SIGNIFICANT FIGURES.

State the difference between extensive, intensive and specific properties of a thermodynamic system.

For a closed system undergoing a thermodynamic cycle, what statement from the list below is correct when comparing the system's initial and final states? Temperature may change. O Pressure may change Volume may change Mass may change Internal energy may change Potential energy may change No system property may change