Chapter 10, Problem 10STP

Interpretation Introduction

Interpretation: The source of energy having the largest increase in usage since 1900 needs to be determined.

Concept introduction: Natural gases are correlated with petroleum deposits and consists mostly gases like methane and significant amounts of ethane, propane and butane.

Answer to Problem 10STP

Petroleum/Natural gas energy has had the largest increase in usage since 1900.

Explanation of Solution

Petroleum must be separated into fractions by the method of boiling to use it efficiently.

Some commercial uses of various petroleum fractions are shown in the table below.

Petroleum Fraction in Terms of Numbers of Carbon Atoms	Major Uses
${\text{C}}_{\text{5}}-{\text{C}}_{\text{10}}$	Gasoline
${\text{C}}_{\text{10}}-{\text{C}}_{\text{18}}$	Kerosene Jet fuel
${\text{C}}_{\text{15}}-{\text{C}}_{\text{25}}$	Diesel fuel Heating oil Lubricating oil
${\text{>C}}_{\text{25}}$	Asphalt

The largest increase in usage since 1900 is petroleum/ natural gas.

Conclusion

Petroleum/Natural gas is seen to have the largest increase in usage since 1900.