# A piston/cylinder has a water volume separated in VA = 0.2

Chapter 3, Problem 211HP

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QUESTION:

Problem 211HP

A piston/cylinder has a water volume separated in VA = 0.2 m3 and VB = 0.3 m3 by a stiff membrane (Fig. P3.211). The initial state in A is 1000 kPa, x = 0.75 and in B it is 1600 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.

FIGURE P3.211

QUESTION:

Problem 211HP

A piston/cylinder has a water volume separated in VA = 0.2 m3 and VB = 0.3 m3 by a stiff membrane (Fig. P3.211). The initial state in A is 1000 kPa, x = 0.75 and in B it is 1600 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.

FIGURE P3.211

Solution 211HP

Step 1 of 7

We are required to calculate the final pressure, work done and heat transfer during the given process.