EngiRef / Thermodynamics Engineering Formula
Combined Gas Law
Combined Gas Law: Relates pressure, volume, and temperature changes. A Laws formula in thermodynamics engineering. Variables P₁, V₁, T₁, P₂, V₂ and T₂, each…
Laws
Specification
- Name
- Combined Gas Law
- Discipline
- thermodynamics
- Category
- Laws
- LaTeX
- \frac{P_1 V_1}{T_1} = \frac{P_2 V_2}{T_2}
- Description
- Relates pressure, volume, and temperature changes
- Conditions
- Fixed amount of gas
- Can solve for
- P₁, V₁, T₁, P₂, V₂, T₂
- Tags
- gas, law, pressure, volume, temperature
Variables
| Symbol | Name | Unit | Si Unit | Imperial Unit |
|---|---|---|---|---|
| P₁ | Initial Pressure | Pa | Pa | psi |
| V₁ | Initial Volume | m³ | m³ | ft³ |
| T₁ | Initial Temperature | K | K | - |
| P₂ | Final Pressure | Pa | Pa | psi |
| V₂ | Final Volume | m³ | m³ | ft³ |
| T₂ | Final Temperature | K | K | - |
Common questions
- What is the Combined Gas Law formula?
- Relates pressure, volume, and temperature changes. It sits under Laws, Thermo engineering in the EngiRef reference.
- What do the symbols in the Combined Gas Law formula mean?
- In Combined Gas Law, P₁ is initial pressure in Pa; V₁ is initial volume in m³; T₁ is initial temperature in K; P₂ is final pressure in Pa; V₂ is final volume in m³; T₂ is final temperature in K.
- When does the Combined Gas Law formula apply?
- Combined Gas Law holds under this condition: Fixed amount of gas.