Ideal Gas Law Guide: PV = nRT

The Ideal Gas Law equation (PV = nRT) relates the Pressure (P), Volume (V), Moles (n), Ideal Gas Constant (R), and Temperature (T in Kelvin) of a gas.

Core Principles & Step-by-Step Method

Follow these standard analytical steps to perform instant, error-free calculations:

• 1. Convert all units to standard SI / gas constant compatible units (T in Kelvin, V in Liters, P in atm or kPa).
• 2. Choose the matching gas constant R (e.g. 0.08206 L·atm/(mol·K) or 8.314 J/(mol·K)).
• 3. Rearrange PV = nRT to solve for the unknown variable (e.g. n = PV / RT).

Instant Online Calculation Tool

Avoid manual calculation errors by using our instant interactive web calculator:

Summary & Key Takeaways

Mastering these chemical relationships ensures accuracy in laboratory preparations, stoichiometry homework, and analytical research. Bookmark this guide or practice with our suite of free tools.