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 combines several simpler gas laws (Boyle's, Charles's, and Avogadro's) into one fundamental equation.

2. How Does the Calculator Work?

The calculator uses the Ideal Gas Law equation:

Where:

• \( P \) — Pressure (atm)
• \( n \) — Amount of substance (mol)
• \( R \) — Ideal gas constant (0.0821 L·atm·K⁻¹·mol⁻¹)
• \( T \) — Temperature (K)
• \( V \) — Volume (L)

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

3. Importance of Pressure Calculation

Details: Calculating gas pressure is essential in chemistry, physics, engineering, and various industrial applications where gas behavior needs to be predicted or controlled.

4. Using the Calculator

Tips: Enter amount in moles, temperature in Kelvin, and volume in liters. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is an ideal gas?
A: An ideal gas is a theoretical gas whose molecules occupy negligible space and have no interactions, obeying the ideal gas law exactly.

Q2: When does the ideal gas law not apply?
A: At high pressures or low temperatures where real gas behavior deviates from ideal, or with polar gases that have significant intermolecular forces.

Q3: Why use Kelvin for temperature?
A: Kelvin is an absolute temperature scale where 0 K represents absolute zero, making it appropriate for gas law calculations.

Q4: What is the value of R in other units?
A: R = 8.314 J·K⁻¹·mol⁻¹ or 62.364 L·Torr·K⁻¹·mol⁻¹, but we use 0.0821 L·atm·K⁻¹·mol⁻¹ for pressure in atm.

Q5: Can I calculate other variables with this equation?
A: Yes, the equation can be rearranged to solve for any variable (n, T, or V) if the others are known.