## Introductory Chemistry (5th Edition)

Using ideal gas law, the volume occupied by 1 mol of gas at 0°C and 1 atm can be calculated. At standard temperature and pressure, the volume occupied by 1 mol of gas is called molar volume of an ideal gas. According to ideal gas law, PV=nRT. $V = \frac{nRT}{P}$ $V = \frac{1 mol \times .0821 \frac{L atm}{Kmol} \times 273 K}{1 atm}$ Solve using a calculator $V = 22.4$ Therefore the molar volume of gas at STP is 22.4 L.