What is molar volume under standard conditions?

Molar volume is defined as the volume occupied by one mole of a substance at standard temperature and pressure (STP), which is typically set at 0 degrees Celsius (273.15 K) and 1 atmosphere pressure. Under these conditions, one mole of an ideal gas occupies a volume of 22.4 liters. This value is derived from the ideal gas law, ( PV = nRT ), where ( P ) is pressure, ( V ) is volume, ( n ) is the number of moles, ( R ) is the ideal gas constant, and ( T ) is temperature in Kelvin.

In contrast, the other values listed (1 liter, 10 liters, and 5.6 liters) do not correspond to the volume one mole of an ideal gas occupies at STP. Therefore, the definition of molar volume under standard conditions clearly identifies 22.4 liters as the accurate answer. Understanding this concept is crucial in stoichiometry and gas law calculations, particularly in situations involving reactions under standard conditions.