Chapter 7, Problem 7.143EP

Find the quanity of heat required to produce 79% dry steam at 8000 kpa from feedwater at 50 degrees celcius ?.

Water Vapor pressure 8 MPa and 350 in an adiabatic turbineIt enters at a temperature of oC and at a pressure of 750 kPacomes out. Reversible The amount of work done by the unit mass of steam for the processcalculate.

A 130 L rigid tank initially contains nitrogen at 400 kPa, 100 K. Thetank is connected to a line which contains nitrogen at 10,000 kPa, 260 K.The valve is opened and nitrogen flows into the tank until half of thetank’s volume is filled with liquid nitrogen, at which point the valve isclosed. During the filling process heat is transferred from the tank tokeep the temperature constant at 100 K. Neglect KE and PE terms.Calculate the final pressure and quality, and the heat transferred inthe process.

This is entropy generation in irreversible process A volume flow of air at 500K, 2000 kPa passes in a long pipe through a temperature reservoir that is kept at a temperature of 1000℃. The air exits at 1000 K and 1.8 MPa. Consider air as ideal gas with variable specific heats, R = 0.287 kJ/kg-K a) Draw a sketch of the system, and draw the process into a T-s-diagram with respect to isobaric lines. b) Determine the heating rate per unit mass of air passing through. c) Determine the entropy generation rate per unit mass flowing through.

One mol of an ideal gas is taken through The gas is subjected a three-step cyclic process. successively to an isothermal expansion at 600 K from 5 to 3 bar (path a to b), a constant-pressure cooling (b to c), and a constant-volume heating (c to a). All processes are reversible. Cy and Cp AH for each step and for the entire process. Draw the cycle on the PV diagram. Compile all results in a table, as follows: 21.686 J mol-K-1 =30 J mol-1K-1. Calculate Q, W, AU and %3D

Question 1. Refrigerant-I34a enters a compressor (as a saturated vapor) at 14°C. It leaves at 1600 kPa, enthalpy of 265 KJ/kg. Velacity is 5s m/s. Mass flow rate is 4.6kg/s. Use property table. What is the qua lity of R-134a at the exit in percentage ? O Rate of work done in KW?

Helium at 100 kPa, 500 K is in a piston/cylinder setup and is compressed to a final pressure of 800 kPa. Consider helium as an ideal gas with constant specific heat capacities. Find the final temperature and the specific work if the above process is (i) reversible adiabatic (ii) reversible isothermal

I do not understand the chapter in general. May you please explain why you completed each step as you have. Thank you.

Please be very detailed