Chapter 6, Problem 6.5P

For a certain gas with constant, R = 320 J/(kg-K) and constant volume specific heat, Cv = 184 J/(kg-K), what is the value of constant pressure specific heat, Cp if the system undergoes a reversible non flow constant pressure

A perfect gas undergoes a process according to the law, Tc 2/5 V d0. Initial pressure and volume are 1 bar and 0.14 m respectively. After the process the volume of the gas becomes 0.07 m°. Find the work done during the process and its final pressure. Assume, R = 287 Nm/kg K.

(2.) Steam enters a turbine with an enthalpy of 1292Btu/lb and leaves with an enthalpy of 1098 Btu/lb. The transferred heat is 13 Btu/lb. what is the work in kW and in hp for a flow of 2 lb/sec? draw a figure also, and explain each step by step solution.

The photo below is the refrigeration cycle of Ammonia, Im just confused on where h2 and Tsup=105 C came from? what kind of table usedand how it is used?

3. Ten Ibm of an ideal gas is compressed in a piston-cylinder arrangement to 1/10 of its initial volume. The ideal gas has a molecular mass (M) of 25 and the ideal gas heat capacity is given by C, = 0.4 + 0.3 x 103 T-0.2 x 106 T² Btu/(lbm °R) where Tis in Rankine. If the initial state 1 is 5 psi and 80° F and the process is polytropic with n=1,3, what is the final (state 2) pressure in psi (8%), the final temperature in °R (8%), the work done in Btu (10%), and the internal energy change (rigorous integration of C. from Tj to T2 is required) (12%), and the heat transfer in Btu (2%) for the process? 人3 13. 1.3 3-R+V B20x (4) 20x0"- 1.3 = 399.1 Psi it

There exists reduction of 1 pound of steam per minute undergoing an isothermal process from 27.5 bar, 316 deg C to 6.8 bar. Compute for steady flow work in BTU/min if change in kinetic energy is 42 hp

ygotins lo 6.69) By injecting liquid water into superheated steam. the desuperheater shown in Fig. P6.69 has a saturated vapor stream at its exit. Steady-state operating data are provided in the accompanying table. Stray heat transfer and all kinetic neand potential energy effects are negligible. (a) Locate states to 1, 2, and 3 on a sketch of the T-s diagram. (b) Determine the rate of entropy production within the de-superheater, K.Modelthe in kW/K. ideal as State p(MPa) T°C) ) v × 10³(m³/kg) u(kJ/kg) h(kJ/kg) s(kJ/kg · K) 1 38 1.0065 X 10-3 166.5 168.3 0.5658 1B 0.1308 320 sat. vap. Y2807.9 3069.5 6.8452 3 1.5 1.159 2519.7 2693.6 7.2233 Desuperheater bol Liquid बेे कत 60°C. Det heet ni water 3. Saturated fos vapor P6.4recom O lo lguons 2 Superheated- vapor honor m2 = 0.03 kg/s motava bogisins odt 1ol,nW ni

* :the initial quality (x1) is 2 kg of ammonia is contained in a rigid sealed tank at 10 °C. The surroundings temperature is 95 °C. The ammonia is now heated until all ammonia transferred to saturated vapor at 90 °C. Tank Ammonia, 2 kg Ti = 10°C T₂ = 90 c (Sat. Vap.) ₂ for Tsun. = 95 °C == Q Find Heat transfer of ammonia And total entropy of generation

1) In a piston cylinder 0.5kg of air expand polytropically from 4 bar and 1100 oC to 1 bar, the index of expansion is 1.75, find the work done and the heat transfer. Example 2.13 A steam turbine operating under steady flow conditions receives 3600 kg of steam per hour. The steam enters the turbine at a velocity of 80 m/s, an elevation of 10 m and specific enthalpy of 3276 kJ/kg. It leaves the turbine at a velocity of 150 m/sec, an elevation of 3 m and a specific enthalpy of 2465 kJ/kg. Heat losses from the turbine to the surrounding amount to 36 MJ/hr. Estimate the power output of turbine.