1. What is the Normal Gas Formula?

The Normal Gas Formula (V = n × 22.4) calculates the volume of one mole of an ideal gas at standard temperature and pressure (STP: 0°C and 1 atm). The value 22.4 L/mol is the molar volume of an ideal gas at STP.

2. How Does the Calculator Work?

The calculator uses the Normal Gas Formula:

Where:

• \( V \) — Volume of gas (L)
• \( n \) — Amount of substance (mol)
• 22.4 — Molar volume at STP (L/mol)

Explanation: The formula assumes ideal gas behavior at standard conditions (0°C, 1 atm). One mole of any ideal gas occupies 22.4 liters at STP.

3. Importance of Volume Calculation

Details: Calculating gas volumes at STP is fundamental in stoichiometry for gas-phase reactions, determining molar masses of gases, and comparing gas quantities under standard conditions.

4. Using the Calculator

Tips: Enter the amount of substance in moles. The value must be positive. The calculator will compute the volume in liters that the gas would occupy at STP.

5. Frequently Asked Questions (FAQ)

Q1: What are the conditions for STP?
A: Standard Temperature and Pressure (STP) is defined as 0°C (273.15 K) and 1 atmosphere (101.325 kPa) of pressure.

Q2: Does this work for all gases?
A: The formula works well for ideal gases and is a good approximation for real gases at STP, though deviations occur with polar gases or at extreme conditions.

Q3: Why is the molar volume 22.4 L/mol?
A: This value comes from the Ideal Gas Law (PV=nRT) calculated at standard conditions (T=273.15K, P=1 atm).

Q4: What if my gas is not at STP?
A: Use the Ideal Gas Law (PV=nRT) directly for non-standard conditions.

Q5: How accurate is this calculation?
A: For ideal gases at exactly STP, it's perfectly accurate. For real gases, it's typically within 1-2% accuracy at STP.