Chapter 5, Problem 5.89P

Interpretation Introduction

(a)

Interpretation:

The original mass of oxygen in the tank is to be calculated.

Concept introduction:

The extent of deviation of the real gases from the ideal gases can be studied by a factor known as compressibility factor. The formula for the compressibility factor (z) is-

$z=\frac{PV}{n\text{RT}}$

Where,

• P is the pressure
• V is the volume of the container
• n is the number of moles
• R is gas constant
• T is the temperature

Interpretation Introduction

(b)

Interpretation:

The initial pressure of the gas at temperature ${40}^{\circ }\text{F}$ is to be stated. The amount of oxygen remains in the tank when application of the ideal −gas equation of state produces a result that is within $3\%$ of that predicted by the compressibility-factor equation of state (i.e., when $0.97\le \text{z}\le 1.03$) is to be calculated.

Concept introduction:

The extent of deviation of the real gases from the ideal gases can be studied by a factor known as compressibility factor.The formula for the compressibility factor (z) is-

$z=\frac{PV}{n\text{RT}}$

Where,

• P is the pressure
• V is the volume of the container
• n is the number of moles
• R is gas constant
• T is the temperature

Interpretation Introduction

(c)

Interpretation:

The time taken by the gauge on the tank to read 50 psig on an average flow rate of $12.5\text{L/min}$ is to be calculated.

Concept introduction:

The extent of deviation of the real gases from the ideal gases can be studied by a factor known as compressibility factor. The formula for the compressibility factor (z) is-

$z=\frac{PV}{n\text{RT}}$

Where,

• P is the pressure
• V is the volume of the container
• n is the number of moles
• R is gas constant
• T is the temperature