Chapter 7, Problem 7.111P

one kg of air is compressed in a cylinder according to the law PV^1.3= constant. If intital temperature is 100°C amd compression ratio is 15, find the work done and change in entropy of air.

Thermodynamics sketch and label the turbine. Sketch and label the process on a T-s diagram also mentions all numbers on the process please. Thanks 7.56 A steam turbine has an inlet of 2 kg/s water at 1000 kPa, 400°C with velocity of 15 m/s. The exit is at 100 kPa, 150°C and very low velocity. Find the power produced and the rate of entropy generation.

Air at the rate of 14kg/sec expands from 3bar, 1500C, 0.1m3 to 1 bar reversibly and adiabatically. Find the exit temperature and power developed. If the heat is given to the system 1200J. Find out the change in internal energy

A car or engine takes 2000 J of heat from a reservoir at 500 K, does some work, and discards some heat to a reservoir at 350 K. Find the total entropy change in the engine during one cycle

Q6) One kg of air is allowed to expand reversibly in a cylinder behind a piston in an isothermal process at 260°C, while the volume is doubled. The piston is then moved and heat rejected at constant pressure until the volume is the same as it was initially. Find the heat flow and the overall change of entropy.

A condenser (heat exchanger) brings 1 kg/s water flow at 10 kPa quality 95% to saturated liquid at 10 kPa. The cooling is done by lake water at 20 degree Celsius that returns to the lake at 30 degree Celsius. For an insulated condenser, find the flow rate of cooling water.

Question 3: Superheated steam enters a turbine at 7 MPa, 550°C, and exits at 150kPa a. Draw the system. b. If the process is reversible adiabatic (isentropic), find the final temperature (T2), the final enthalpy (h2,) of the steam, and do the energy balance to calculate the turbine work (Wts). c. Using entropy balance, show that Sgen for the above process is 0. d. If the isentropic efficiency is 85%, find the actual final temperature (T23) and calculate Sgen? e. Plot process in (b) and (d) on a Ts diagram with proper labelling.

This question is about vapor nozzle Due to a failure, ammonia in a large container overheats to 1400 kPa, 573 K. At this state, a small crack opens in the container that acts as a nozzle. The outside environment is at 100 kPa, 298 K, and the mass flow rate of ammonia is 10 g/s . Assume negligible nozzle inlet velocity and adiabatic reversible flow. Determine the exit velocity, and the exit cross section.

A mixture of 40% oxygen and 60% argon by mass flows into a turbine at 1000 K, 400 kPa and expands to 100 kPa. The turbine has an isentropic efficiency of 85%. Find the actual turbine specific work and specific entropy generation assuming constant specific heats.