# PDF Solutions Manual Fundamentals of Thermodynamics Sonntag-Borgnakke-Van Wylen

Contents:

Find the final pressure, volume and the work done by the water. Initially the piston floats, similar to the setup in Problem 4.

Now heat is added so a final pressure of kPa is reached. Find the final volume and the work in the process. An additional kg water is now forced into the tank. Assuming constant temperature throughout, find the final pressure of the nitrogen and the work done on the nitrogen in this process. Solution: The water is compressed liquid and in the process the pressure goes up so the water stays as liquid. Incompressible so the specific volume does not change.

The nitrogen is an ideal gas and thus highly compressible. What is the pressure and the quality of the water, when it has cooled to 25oC? How much work is done? Solution: Control volume radiator. After the valve is closed no more flow, constant volume and mass. The balloon and ammonia are now heated so that a final pressure of kPa is reached. Considering the ammonia as a control mass, find the amount of work done in the process.

Find the final volume and temperature, and determine the work done during the process. Solution: Take CV as the Ra which is a control mass.

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Process: Pv1. Calculate the work done in the process. Assume the water vapor is an ideal gas. Solution: C.

Lec-1 Introduction and Fundamental Concepts

Determine the work done by the carbon dioxide in the cylinder during the process. Solution: Knowing the process P vs. V and the states 1 and 2 we can find W. If the piston just hits the upper stops the volume is 0. Heat is now added until the pressure reaches 1. Find the final temperature, show the P—V diagram and find the work done during the process.

The mass of the piston is such that a pressure of kPa will float it.

Find the final pressure, volume and the work, 1W2. Cylinder B, having a frictionless piston of such mass that a pressure of kPa will float it, is initially empty.

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What is the work done by the argon? Solution: Take C. Boundary movement work done in cylinder B against constant external pressure of kPa. The inside pressure balances ambient pressure of kPa plus an externally imposed force that is proportional to V0. Now heat is transferred to the system to a final pressure of kPa. Find the final temperature and the work done in the process.

This is a control mass. The setup is heated and thus expands, moving the piston. Verify the final pressure is about kPa by iteration and find the work done in the process. State 1: Table B. Find the total work for the process, assuming a piecewise linear variation of P versus V. Atmospheric pressure is kPa, and the cylinder cross-sectional area is 0.

Find the final pressure, final volume and the work done by the R Solution: State 1: T,x from table B. Now the piston is balanced with an additional constant force and the pin is removed. The cooling continues to a state 3 where the Ra is saturated liquid. Show the processes in a P-V diagram and find the work in each of the two steps, 1 to 2 and 2 to 3. Solution : CV Ra This is a control mass. P Properties from table B. With the ammonia as a control mass, determine the boundary work during the process. From Table B. From table B. What is the required work to obtain a relative strain of 0.

Solution : Assume a free surface on both sides of the frame, i. For a first approximation, assume that magnetization is proportional to the magnetic field intensity divided by the temperature of the magnetic substance. Determine the work done in an isothermal process during a change of magnetization from M1 to M2. Take the battery as a control mass and find the instantaneous rate of work and the total work done over 4 hours..

The cylinder Fig. At what pressure will the piston touch the second spring? Find the final temperature and the total work done by the ammonia. For a control volume that consists of the space inside the balloon, determine the work done during the overall process.

The spring force is zero when the lower piston stands at the bottom, and when the lower piston hits the stops the volume is 0. Find the initial temperature and the pressure that will lift the upper piston. Find the final T, P, v and the work done by the water. The inside pressure balances ambient pressure of Solution : C. Ra P This is a control mass. Properties from table C. Solution: a Table B. The tank is now cooled to K. What are the work and heat transfer for this process? Calculate the heat transfer during the process.

Calculate the heat transfer in the process. Calculate the heat transfer from the water. The tank and ammonia is now heated to a final pressure of 1 MPa. Determine the heat transfer for the process. What was the heat transfer to or from the tank during this process? Solution: P C. R in tank.

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