Standard molar volume

Definition

Standard molar volume is the volume occupied by one mole of an ideal gas at standard temperature and pressure (STP), which is 0°C (273.15 K) and 1 atm pressure. It is approximately 22.414 liters.

5 Must Know Facts For Your Next Test

1. Standard molar volume is based on the conditions of STP: 0°C and 1 atm.
2. One mole of any ideal gas occupies roughly 22.414 liters at STP.
3. The concept relies on the Ideal Gas Law, represented as $PV = nRT$.
4. Standard molar volume simplifies stoichiometric calculations in gas reactions.
5. It is a constant used to compare different gases under identical conditions.

Review Questions

• What are the standard temperature and pressure conditions for calculating standard molar volume?
• How many liters does one mole of an ideal gas occupy at STP?
• In what ways does the standard molar volume simplify chemical calculations?

Related terms

Ideal Gas Law: An equation of state for a hypothetical ideal gas, given by $PV = nRT$, where P is pressure, V is volume, n is moles, R is the gas constant, and T is temperature.

Mole: A unit that measures the amount of substance, defined as containing exactly 6.02214076 × 10^23 particles (Avogadro's number).

Avogadro's Law: States that equal volumes of all gases contain the same number of molecules at the same temperature and pressure.