Formula
This calculator uses the equation below. Use it as a quick reference when checking setup before solving.
w = −P_ext ΔVPhysical Chemistry
Pressure–Volume Work (constant external pressure) Calculator
Compute Pressure–Volume Work (constant external pressure) using w = −P_ext ΔV.
w = −P_ext ΔV
Run this calculator
Leave a nullable field blank to solve for it.
Variable glossary
P Ext (p_ext)
Input variable 'p_ext' for Pressure–Volume Work (constant external pressure). Set one variable to null to solve for it.
Delta V (delta_v)
Input variable 'delta_v' for Pressure–Volume Work (constant external pressure). Set one variable to null to solve for it.
W (w)
Result variable 'w' for Pressure–Volume Work (constant external pressure). Set to null (or omit) to compute this value.
Worked example
Try these sample values to validate the setup, then replace inputs with your own conditions.
- p_ext: 2
- delta_v: 3
Frequently Asked Questions
What does the Pressure–Volume Work (constant external pressure) calculator solve?
It solves Pressure–Volume Work (constant external pressure) problems in physical chemistry using your provided inputs and computes unknown values when nullable fields are left blank.
Do I need to convert units before using this tool?
Use the unit toggles where available (for example K/C and L/mL). ChemGenius converts values to the calculator's base units automatically before solving.
Can I save this result in my workflow?
Yes. After computing a result, you can continue into ChemGenius workflows like protocol drafting or notes to keep your calculation context attached to downstream work.