Chapter 1.7, Problem 28P

A)

Interpretation Introduction

Interpretation:

The change in internal energy of the steam has to be determined.

Concept introduction:

The change in internal energy.

$\Delta U=M\left({\widehat{U}}_2-{\widehat{U}}_1\right)$

Here, mass of the steam is M, specific internal energy at state 1 and 2 is ${\widehat{U}}_1\text{and}{\widehat{U}}_2$ respectively.

B)

Interpretation Introduction

Interpretation:

The change in internal energy of the liquid water has to be determined.

Concept introduction:

The change in internal energy.

$\Delta U=M\left({\widehat{U}}_2-{\widehat{U}}_1\right)$

Here, mass of the steam is M, specific internal energy at state 1 and 2 is ${\widehat{U}}_1\text{and}{\widehat{U}}_2$ respectively.

C)

Interpretation Introduction

Interpretation:

Find out the form of energy transfer from the part A.

D)

Interpretation Introduction

Interpretation:

Check the possibility of accomplishes both processes simultaneously by taking most of the energy that was removed from the steam in part A.