Chapter 7, Problem 7.14P

Interpretation Introduction

(a)

Interpretation:

The reason corresponding to the fact that the figure $17\text{06 J/mol}$ is not the true internal energy of one $\text{g-mole}$ of oxygen gas at $1\text{50 K}$ and $41.6\text{4 atm}$ is to be explained. The correct physical significance of that figure is to be stated.

Concept introduction:

The summation of the specific internal energy of the system with the product of the pressure and specific volume is called as the specific enthalpy of the system. It is expressed as follows,

$H=U+PV$

Where,

• $U$ is the internal energy of the system.
• $P$ is the pressure.
• $V$ is the specific volume of the system.

Interpretation Introduction

(b)

Interpretation:

The specific enthalpy of oxygen gas at the given temperature and pressure is to be calculated. The physical significance of that figure and the reference state which is used to calculate it are to be stated.

Concept introduction:

The summation of the specific internal energy of the system with the product of the pressure and specific volume is called as the specific enthalpy of the system. It is expressed as follows,

$H=U+PV$

Where,

• $U$ is the internal energy of the system.
• $P$ is the pressure.
• $V$ is the specific volume of the system.