1. What is the Ideal Gas Law?

The Ideal Gas Law describes the relationship between pressure, volume, temperature and amount of an ideal gas. It provides a good approximation of the behavior of many gases under many conditions, though it has limitations for real gases at high pressures or low temperatures.

2. How Does the Calculator Work?

The calculator uses the Ideal Gas Law equation:

Where:

• \( V \) — Volume in cubic meters (m³)
• \( n \) — Amount of substance in moles
• \( R \) — Universal gas constant (8.314 J/mol·K)
• \( T \) — Temperature in Kelvin (K)
• \( P \) — Pressure in Pascals (Pa)

Explanation: The equation shows that volume is directly proportional to amount of gas and temperature, and inversely proportional to pressure.

3. Importance of Gas Volume Calculation

Details: Calculating gas volume at specific conditions is essential in chemistry, physics, engineering, and industrial applications where gas behavior needs to be predicted or controlled.

4. Using the Calculator

Tips: Enter amount of substance in moles, temperature in Kelvin, and pressure in Pascals. All values must be positive numbers. Temperature must be in absolute scale (Kelvin).

5. Frequently Asked Questions (FAQ)

Q1: What is the value of the gas constant R?
A: The universal gas constant R is 8.314 J/mol·K in SI units. Other common values include 0.08206 L·atm/mol·K and 62.36 L·torr/mol·K.

Q2: How do I convert Celsius to Kelvin?
A: Kelvin = Celsius + 273.15. Always use absolute temperature (Kelvin) in gas law calculations.

Q3: What are the limitations of the ideal gas law?
A: The law assumes no intermolecular forces and that gas molecules occupy no volume. It works best for low pressures and high temperatures.

Q4: How do I convert other pressure units to Pascals?
A: 1 atm = 101325 Pa, 1 bar = 100000 Pa, 1 mmHg (torr) ≈ 133.322 Pa.

Q5: Can I use this for mixtures of gases?
A: Yes, n represents the total moles of all gas species present.