🎓 Chemistry • Gas Laws
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Ideal Gas Law Calculator (PV = nRT)
Solves the ideal gas equation PV = nRT for any missing variable with universal gas constant R = 0.08206 L·atm/(mol·K).
What is the Ideal Gas Law?
The Ideal Gas Law is the equation of state of a hypothetical ideal gas, combining Boyle's, Charles's, and Avogadro's laws.
Formula & Step-by-Step Calculation
P × V = n × R × T
P in atm, V in Liters, n in moles, T in Kelvin, R = 0.082057 L·atm/(mol·K).
Worked Step-by-Step Examples
Example 1
Volume of 1 mole of ideal gas at STP (1 atm, 273.15 K)
Solution: 22.41 Liters
• V = (1 × 0.08206 × 273.15) / 1 = 22.41 L
Common Real-World & Academic Use Cases
- ✓ Gas cylinder pressurized storage
- ✓ Pneumatics volume design
- ✓ Atmospheric weather balloon buoyancy
How to Use the Ideal Gas Law Calculator (PV = nRT)
1
Fill 3 Known Variables
Enter any 3 values among P, V, n, and T.
2
Leave 1 Blank
Leave unknown box empty.
3
Read Calculated Property
Inspect output with units.
Frequently Asked Questions
Q: What is STP?
Standard Temperature and Pressure: 0°C (273.15 K) and 1 atmosphere (101.325 kPa).