How to Calculate Ideal Gas Properties (PV = nRT)
Compute state variables step-by-step:
Enter Pressure P
Input gas pressure P in atmospheres (atm).
Enter Volume V
Input gas container volume V in Liters (L).
Enter Moles n
Input amount of substance n in moles (mol).
Compute State
Uses universal gas constant R = 0.082057 L·atm/(mol·K) to balance state.
Key Features & Gas State Physics
Universal Gas Constant Engine
Uses R = 0.082057 L·atm/(mol·K) and 8.314 J/(mol·K).
STP & RTP Quick Presets
Standard Temperature & Pressure (0°C, 1 atm) and Room Temp & Pressure (25°C, 1 atm).
Molar Gas Density
Calculates gas density in g/L for pure gas species.
Physical Chemistry Guide: The Ideal Gas Law
The Ideal Gas Law (PV = nRT) relates the macroscopic state variables of hypothetical ideal gases:P · V = n · R · TAt STP (273.15 K and 1 atm), 1 mole of any ideal gas occupies exactly 22.414 Liters.
Frequently Asked Questions
?What makes a gas 'ideal'?
An ideal gas assumes point-mass particles with zero volume and zero intermolecular attractive/repulsive forces. Real gases approximate ideal gas behavior at high temperatures and low pressures.