1. What is the Ideal Gas Law?

The Ideal Gas Law (PV = nRT) describes the relationship between pressure (P), volume (V), number of moles (n), and temperature (T) of an ideal gas. The constant R is the ideal gas constant (0.0821 L·atm/mol·K).

2. How Does the Calculator Work?

The calculator uses the Ideal Gas Law equation:

Where:

• \( P \) — Pressure (atm)
• \( V \) — Volume (L)
• \( n \) — Moles of gas (mol)
• \( R \) — Ideal gas constant (0.0821 L·atm/mol·K)
• \( T \) — Temperature (K)

Explanation: The equation relates the four variables that describe the state of an ideal gas.

3. Importance of Ideal Gas Law

Details: The Ideal Gas Law is fundamental in chemistry and physics for predicting the behavior of gases under different conditions, though real gases deviate from ideal behavior at high pressures and low temperatures.

4. Using the Calculator

Tips: Enter any three known variables to calculate the fourth. All values must be positive numbers. Temperature must be in Kelvin.

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

Q3: When does the ideal gas law not apply?
A: At high pressures, low temperatures, or for gases with strong intermolecular forces (like water vapor).

Q4: What are common uses of the ideal gas law?
A: Used in chemical engineering, thermodynamics, meteorology, and for calculations involving gas reactions.

Q5: What is the value of R in other units?
A: R = 8.314 J/mol·K or 62.364 L·Torr/mol·K, depending on the units needed.