Chapter 6, Problem 6.47P

Steam is expanded from an initial state of 1300 kPa and 410 deg C to a final state of 102 kPa and 95 deg C. Estimate AH and AS using Steam Table, RK and generalized compressibility factor.

4. A) Wet steam at 200 deg C has a specific enthalpy of 2300 kJ/kg (in the 2 phase region). Determine the quality and specific volume and specific entropy of the mixture. B) Calculate change in entropy of an ideal gas that expands freely to twice its volume, assume isothermal reversible process. What is the work done in the process 2

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A rigid container (0.066 m3) is filled with an ideal gas (Cv = 2.5R) at 501K and 1.1 bar.  Calculate the entropy changes asked in below. What is the entropy change when 15,000 J of heat is transferred to a gas?

1mot alr is heated reversibly at constant pressure from Isi to 300 c, and then cooled reversibly atconstant volume back to the initral temperature, the initial prevure is L03bar. Calculate the net heat flow and the overall change of entropy Sketch the en T-s diagram. Ans. L lo1.51g , 0.2461glk] process

If 6 liters of air at a pressure of 100 kPaa and 25 0 C are compressed reversiblyaccording to PV 2 = C, until the volume becomes 2 liters. Please answer the following a. The thermodynamic process the problem representsb. the pressure, temperature, and volume after the processc. change in internal energy, change in enthalpy and change in entropyd. work nonflow and heat transferred

ESL-2 150 grams of water at 20.0°C in a pan is places in an oven that is at a constant 100.0°C. a) Starting with AS-dQr/T, clearly explain all steps – evaluating the integral and finding the mumerical value - to find the total change in entropy for the original H20 to go from 20.0°C to become steam at 100.0°C. b) Starting with AS-dQr/T, clearly explain all steps- evaluating the integral and finding the numerid value to find the change in entropy for the oven interior for this entire process. c) Find the total change in entropy for the universe for this entire process. (Neglect the change due to the warming of the pan). Use this answer to explain whether this process is reversible or irreversible.

10 moles of a diatomic gas are subjected to a thermal cycle as shown in the figure   calculate:   a) the Carnot efficiency of the cycle    b) the actual efficiency of the cycle. Consider that the CA process is adiabatic.    c) the entropy change at each stage. See the picture