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 calculator can solve for any one variable if the other three are known. If all four are entered, it calculates the PV/nRT ratio to check how closely the gas follows ideal behavior.

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 three known values to calculate the fourth. Leave the unknown variable as zero. All values must be positive numbers. Temperature must be in Kelvin (K = °C + 273.15).

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 intermolecular forces, obeying the ideal gas law exactly.

Q2: When do real gases deviate from ideal behavior?
A: At high pressures and low temperatures, when molecular volume and intermolecular forces become significant.

Q3: What are common units for the ideal gas law?
A: Pressure in atm, volume in L, moles in mol, temperature in K, with R = 0.0821 L·atm/mol·K.

Q4: How do I convert Celsius to Kelvin?
A: Add 273.15 to the Celsius temperature (K = °C + 273.15).

Q5: What if my PV/nRT ratio isn't 1?
A: A ratio significantly different from 1 indicates non-ideal behavior or measurement errors.