Under standard temperature and pressure (STP), what is the volume of one mole of gas?

At standard temperature and pressure (STP), which is defined as a temperature of 0 degrees Celsius (273.15 K) and a pressure of 1 atmosphere (atm), one mole of an ideal gas occupies a volume of 22.4 liters. This relationship stems from the ideal gas law, which describes how gases behave under various conditions.

This specific volume is significant in chemistry and physics because it allows scientists and students to make calculations involving gas reactions, stoichiometry, and conversions between different states of matter. Understanding this value helps in practical applications, such as determining the behavior of gases in chemical reactions and industrial processes.

The reasoning behind the other options does not align with the accepted definition of STP for gases. While volumes like 24.0 L/mole or 25.0 L/mole may reflect conditions under different scenarios or slightly different temperature or pressure definitions, they do not adhere to the standard definition of STP as recognized in most scientific contexts. Therefore, 22.4 L/mole remains the correct and universally accepted volume for one mole of gas at STP.