Ideal Gas Law Calculator (PV=nRT)
Ideal Gas Law Calculator (PV = nRT)
Enter any three of the four parameters (pressure, volume, amount of substance, temperature) - the calculator will automatically find the fourth. Gas constant R = 0.0821 L·atm/(mol·K).
Ideal Gas Law Formula:
PV = nRT
- P = Pressure (atm)
- V = Volume (L)
- n = Amount of substance (mol)
- R = Universal gas constant (0.0821 L·atm/(mol·K))
- T = Temperature (K)
What is an ideal gas?
An ideal gas is a theoretical model where gas molecules have no volume and no intermolecular forces. Real gases approximate ideal behavior under certain conditions (high temperature, low pressure).
Units to use:
- Pressure: atmospheres (atm)
- Volume: liters (L)
- Amount: moles (mol)
- Temperature: Kelvin (K) - remember: K = °C + 273.15
Applications:
- Chemical reaction calculations
- Gas storage and transport
- Thermodynamics problems
- Engineering calculations
- Laboratory gas analysis
Frequently Asked Questions
What is the universal gas constant?
This calculator uses R = 0.0821 L·atm/(mol·K) - the standard value for calculations in the specified units.
What units should I use?
Pressure in atmospheres (atm), volume in liters (L), amount in moles (mol), temperature in Kelvin (K).
What is an ideal gas?
An ideal gas is a model that describes gas behavior under conditions of no intermolecular interactions, perfectly obeying PV = nRT.
Where is the PV=nRT formula used?
This formula is widely used in chemistry, physics, thermodynamics, and engineering for gas state calculations.
How to convert Celsius to Kelvin?
Use the formula: K = °C + 273.15. For example, 25°C = 25 + 273.15 = 298.15 K.