How many liters does one mole of gas occupy at standard pressure and temperature?

At standard pressure and temperature (STP), which is defined as a temperature of 0 degrees Celsius (273.15 Kelvin) and a pressure of 1 atmosphere, one mole of an ideal gas occupies 22.4 liters. This value is derived from the ideal gas law, which states that the volume of a gas is directly proportional to the number of moles of the gas, under the condition of constant temperature and pressure.

Using the ideal gas constant and the equation of state for an ideal gas, we can derive this relationship. Under STP conditions, the volume calculated aligns with empirical observations of gas behavior. The concept of molar volume at STP is crucial in stoichiometric calculations in chemistry and engineering as it allows for the direct conversion between moles of gas and volume.

Thus, the volume of 22.4 liters for one mole of gas at STP is a fundamental constant in chemistry, making it essential knowledge for engineers and scientists working in fields related to gas behavior and thermodynamics.