Variables
Description
What is this formula?
The Ideal Gas Law relates pressure, volume, temperature, and the amount of gas in a thermodynamic system. It is one of the most important equations in thermodynamics and describes the behavior of gases under many practical engineering and scientific conditions.
When to use it
Use this formula when analyzing gases that behave approximately as ideal gases, especially at moderate pressures and temperatures. It is commonly used to calculate pressure, volume, temperature, or the number of moles when the other variables are known.
Example
Given:
n = 2 mol
T = 300 K
V = 0.050 m³
R = 8.314 J/mol·K
Formula:
P = (nRT)/V
Substitution:
P = (2 × 8.314 × 300) / 0.050
Result:
P = 99768 Pa ≈ 99.8 kPa
Applications
Gas storage calculations, thermodynamic analysis, chemical engineering, HVAC systems, combustion studies, laboratory experiments, and industrial process design.