Which gases are classified as liquefied petroleum (LP) gases?

Liquefied petroleum (LP) gases are primarily composed of propane and butane. These two gases, when compressed, can be stored in liquid form and are commonly used for heating, cooking, and as fuel for various applications, including HVAC systems. Both propane and butane are considered alkanes and have relatively high energy content, making them effective fuel sources.

Propane is often used in rural areas or where natural gas service is not available due to its portability and ease of storage in liquid form. Butane, while also used for heating and cooking, is more commonly found in household portable fuel applications, like lighters and camping stoves.

In comparison, the other options include gases that do not fit the classification of LP gases. Methane is a key component of natural gas, and ethylene is an unsaturated hydrocarbon, which does not fall under the LP gas category. Thus, the correct identification of propane and butane is essential for understanding the types of fuel gases used in various applications.