Combined Gas Law Calculator

Enter value and click on calculate. Result will be displayed.

Formula:
PiVi / Ti = PfVf / Tf

Select calculator :
 
Initial Volume(Vi) :
L
Initial Pressure(Pi) :
kPa
Initial Temperature(Ti) :
K
Final Volume(Vf) :
L
Final Pressure(Pf) :
kPa
Result:

What is a Combined Gas Law Calculator?

A Combined Gas Law Calculator calculates the relationship between pressure, volume, and temperature of a gas when the amount of gas (in moles) is constant. It combines Boyle's Law, Charles's Law, and Gay-Lussac's Law into one equation:

Where:

  • P1​ , P2​ = Initial and final pressures
  • V1​ , V2​ = Initial and final volumes
  • T1​ , T2​ = Initial and final temperatures (in Kelvin)

Why use a Combined Gas Law Calculator?

  • Simplify Calculations: It combines multiple gas laws into one equation, making it easier to solve problems without needing to use separate formulas.
  • Real-World Applications: Helps analyze and predict the behavior of gases in various conditions, such as in engines, weather systems, or industrial processes.
  • Efficiency: Quickly calculates changes in pressure, volume, or temperature when other values are known.

How does a Combined Gas Law Calculator work?

  1. Input: You provide the initial and final values for pressure, volume, and temperature (usually in SI units: pressure in pascals, volume in cubic meters, temperature in Kelvin).
  2. Process: The calculator uses the combined gas law equation to solve for the unknown variable (pressure, volume, or temperature).
  3. Output: The result gives you the new value of the unknown property based on the initial conditions.

Example:
If you know the initial pressure P1=2 atm, volume V1=5 L, and temperature T1=300 K, and you need to find the final pressure P2​ when V2=10 L and T2=350 K, you can input these into the formula and calculate P2​ .

When should you use a Combined Gas Law Calculator?

  • Gas-related Problems: When you need to find how pressure, volume, or temperature changes for a gas in a closed system, such as in physics or chemistry problems.
  • Real-World Applications: In engineering and environmental science, when dealing with gases under varying conditions (e.g., in engines, refrigeration systems, or weather modeling).
  • Laboratory Work: In labs where precise control of gas conditions is necessary.