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A constant-pressure balloon contains 2-lbm 50/50 vapor/liquid water mixture by mass (i.e. x1 =...

Question:

A constant-pressure balloon contains 2-lbm 50/50 vapor/liquid water mixture by mass (i.e. x1 = 0.5) at 500 psia. A small pinhole in the top of the balloon expels 0.5-lbm vapor until the total volume reduces 50%.

a. What is the initial volume of the balloon in ft{eq}\displaystyle ^3? {/eq}

b. How much boundary work was done ON the system, in Btu?

c. What is the final quality?

d. What is the final specific internal energy, in Btu/lbm?

e. How much heat transfer occurred in Btu? Also indicate direction (in or out).

Pressure :

Whenever a force is applied to a particular area on an object ,pressure acts on the object and is calculated as the force applied per unit area of the object.

Answer and Explanation:

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What is Static Pressure? - Definition & Formula

from Introduction to Engineering

Chapter 5 / Lesson 3
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