First Law for Isobaric Process (ΔQ = ΔU + PΔV)
jee-mainjee-advancedneet-ug
ΔQ = ΔU + PΔV
What each symbol means
| Symbol | What it stands for |
|---|---|
| P | Constant pressure (Pa) |
| ΔQ | Heat supplied to system (J) |
| ΔU | Change in internal energy (J) |
| ΔV | Change in volume (m³) |
When to use this
For gas in cylinder with movable piston at constant pressure. Combines First Law with work expression for isobaric process.