1. What is the Ideal Gas Law?

The Ideal Gas Law relates the pressure, volume, temperature, and amount of an ideal gas. It is expressed as PV = nRT, where P is pressure, V is volume, n is amount of substance, R is the gas constant, and T is temperature.

2. How Does the Calculator Work?

The calculator uses the Ideal Gas Law equation:

Where:

• \( V \) — Volume (L)
• \( n \) — Amount of substance (mol)
• \( R \) — Gas constant (0.0821 L·atm/mol·K)
• \( T \) — Temperature (K)
• \( P \) — Pressure (atm)

Explanation: The equation shows how volume changes with amount of gas, temperature, and pressure under ideal conditions.

3. Importance of Gas Volume Calculation

Details: Calculating gas volume is essential in chemistry, physics, and engineering for designing systems, predicting gas behavior, and conducting experiments.

4. Using the Calculator

Tips: Enter amount of substance in moles, temperature in Kelvin, and pressure in atmospheres. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What are the units for the gas constant R?
A: The calculator uses R = 0.0821 L·atm/mol·K. Other values of R exist for different unit systems.

Q2: How accurate is the ideal gas law?
A: It works best for low pressures and high temperatures. For real gases under extreme conditions, more complex equations are needed.

Q3: How do I convert Celsius to Kelvin?
A: Add 273.15 to the Celsius temperature to get Kelvin (K = °C + 273.15).

Q4: What is standard temperature and pressure (STP)?
A: STP is defined as 273.15 K (0°C) and 1 atm pressure. At STP, 1 mole of ideal gas occupies 22.4 L.

Q5: Can I use this for mixtures of gases?
A: Yes, n represents the total moles of gas particles, regardless of their chemical identity.