Chapter 6, Problem 6.102P

I've already found T2 and A2 for part A. They are T2 = 310.2K and A2 = .0139m^2. But I can't figure out how to find the rate of entropy production with units KW/K (that's what my questions seems to be asking for, but it may be a typo). All of the solutions for this problem here on Bartelby find the rate of entropy production with units KW / (K*kg).

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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Kindly solve it complete within 30 minute please I really need help

9. Air is expanded from 400 kPa, 600 K in a polytropic process to 150 kPa, 400 K in a piston cylinder arrangement. Find the polytropic exponent n and the work and heat transfer per kg air using constant heat capacity.

Four kilograms per second of Methane is compressed isentropically from 104.3 kPa, 140 degree Fahrenheit to 440.6 degree Fahrenheit. Assuming that the process is for ideal gas, find:   Final Pressure, torr   Change in entropy   Work, HP

2000 kg cast iron hoisin at 350 degree Celsius is quenched in 4000 kg of water at 15 degree Celsius. Find the amount of heat transferred to the water bath, entropy change for water and cast iron, use the entropy generation to prove that the entire system does not violate the second law of thermodynamics. Water specific heat of 4.18kj/kg.k, cast iron specific heat of 0.42kj/kg.k

2.A piston cylinder arrangement contains steam at 10MPaa saturated liquid. Heat was transferred isothermally so that the pressure reaches 2MPaa. а. Find the final temperature of the steam. b. Find the change of entropy in kJ/kg if there is no entropy production.

I need the solution for this problem pls. Thanks a lot.