Which of the following best describes propane?

Propane is best described as a flammable hydrocarbon because it consists of carbon and hydrogen atoms (C3H8) and ignites easily in the presence of oxygen. Hydrocarbons are a category of compounds primarily made up of these two elements, and propane falls into the category of aliphatic hydrocarbons, which are often used as fuels. This flammable characteristic is crucial for its applications in various industries, including heating and fueling vehicles.

While propane does exist in a liquid state when pressurized, it is typically a gas at standard atmospheric conditions; therefore, describing it solely as a liquid at room temperature does not accurately capture its properties. Additionally, propane is definitely not a non-combustible gas or a solid, as these descriptions would misrepresent its ability to burn and its physical state under normal conditions. Understanding these properties of propane is essential for safe handling and application, especially in contexts where its flammability is exploited as a heat or power source.