# Write the Mathematical Expression of the First Law of Thermodynamics for The Isobaric Process - Physics

Write the mathematical expression of the First Law of Thermodynamics for the Isobaric process

#### Solution

Condition: P= constant hence q=qp

Mathematical expression of the first law :

Delta U=qp+W

Delta U=qp-P_(ex)DeltaV[W=-P_(ex)Delta V] or [qp=DeltaU+P_(ex)DeltaV]

Concept: Chemical Thermodynamics and Energetic - First Law of Thermodynamics
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