Is Propane a Pure Substance?

Is the mixture of liquid and vapor propane considered a pure substance?

Can the contents of a propane tank be considered a pure substance? Explain it.

Answer:

Yes, the mixture of liquid and vapor propane can be considered a pure substance. Both the liquid and vapor phases of propane have the same chemical composition, making them pure substances. In more scientific terms, propane gas is put under pressure in a tank, causing it to transform into a liquid.

Propane is a pure substance because its chemical makeup remains constant regardless of its phase. Both the liquid and vapor phases of propane have the same chemical composition, which allows the mixture of the two to be considered a pure material.

A pure substance is characterized by having a known and consistent composition at all times. In the case of propane, both phases share the same chemical identity, making them pure substances.

Therefore, the mixture of liquid and vapor propane can indeed be regarded as a pure substance due to the consistent chemical composition of both phases.