Chapter 6, Problem 6.82P

Q1: A cylinder/piston contains 0.1m³ of air at 110 kPa, 25°C. The air is compressed in a reversible polytropic process to a final state of 800 kPa, 200°C. Find the work done by the air, the heat transfer and the total entropy change for the process.Sketch the process on a P-V diagram.

1.Five kilogram of steam is initially at 1MPa and y=40% inside the piston cylinder. There is a 50C superheat introduced in steam isopiestically. Find the change of entropy of the steam.

A piston/cylinder has a water volume separated in VA = 0.3 m³ and VB = 0.4 m by a stiff membrane. The initial state in A is 1000 kPa, x = 0.8 and in B it is 1500 kPa and 250°C. Now the membrane ruptures and the water comes to a uniform state at 200°C. What is the final pressure? Find the work and the heat transfer in the process. Po mp cb A:H2O B:H20

Steam at 120 bar has a specific volume of 0.01721 m3/kg, find the temperature, enthalpy and the internal energy.

I need the answer as soon as possible

steam at 11 MPa has a specific volume of 0.0196 m^3/kg , find the temperature, the enthalpy, and the internal energy.

Two rigid tanks are filled with water. Tank A is 0.2 m³ at 100 kPa, 150°C and tank B is 0.3 m³ at saturated vapor 300 kPa. The tanks are connected by a pipe with a closed valve. We open the valve and let all the water come to a single uniform state while we transfer enough heat to have a final pressure of 300 kPa. Give the two property values that determine the final state and find the heat transfer. B A

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.

An automobile tire is inflated to 105 kPa at 30 deg. C. After being driven the temperature rises to 55 deg. C. Find the final pressure under isochoric process.