Ideal Gas Law
Also known as: PV=nRT, Gas Law Formula
PV = nRT
PV = nRTWhat It Calculates
Relates pressure, volume, temperature, and amount of an ideal gas. Combines Boyle's, Charles's, and Avogadro's laws.
variables
| Symbol | Name | Description |
|---|---|---|
| P | Pressure | Gas pressure |
| V | Volume | Volume of the gas |
| n | Amount | Number of moles of gas |
| R | Gas Constant | 8.314 J/(mol·K) or 0.0821 L·atm/(mol·K) |
| T | Temperature | Absolute temperature |
Worked Examples
1
V = nRT/P = 2 × 0.0821 × 300 / 12
V = 49.26 LResult: 49.26 L
Common Mistakes
Temperature MUST be in Kelvin (K = °C + 273.15)
Use matching units for R
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