Chapter 6, Problem 6.29P

Interpretation Introduction

Interpretation:

If in a rigid vessel of given volume, saturated vapor steam is in equilibrium with saturated liquid water at $\text{323}\text{.15 K}$ and heat is transferred to the vessel until one phase just disappears. Which phase remains and determine its temperature and pressure and find out amount of heat transferred.

Concept Introduction:

During the heat transferred in the process, total mass and volume remains constant. So, the total volume after the heat transferred is same as total volume at $\text{323}\text{.15 K}$ . So, find the total volume and mass at $\text{323}\text{.15 K}$ using the saturated steam table and use them to find temperature and pressure after the heat transferred.

The heat transferred in the process is defined as:

$Q=m(U_2-U_1)$

                    .... (a)

Where $m$ is the mass of steam, $U_2$ is the internal energy after heat transferred and $U_1$ is the internal energy before heat transferred.