The document discusses the isobaric (constant pressure) process in thermodynamics, highlighting that pressure remains constant while the heat transferred to the system does work and alters internal energy. It explains how this process is represented on a PV diagram and mentions the relationship between pressure, volume, and temperature for ideal gases. The presentation concludes with a boundary work equation relevant to constant pressure conditions.

1. Vishvakarma
Government Engineering
College, Chandkheda
•Name –Darshil Vekaria
•Branch–Civil Engineering
•Subject- EME
•Topic-Constant Pressure Process
•Enrollment –150170106061

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3. Isobaric -
Constant Pressure
Process
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4. • An isobaric process is a thermodynamic
process in which the pressure stays
constant.
• The term derives from the greek iso-
(equal) and baros-(weight).
• The heat transferred to the system
does work,but also changes the
internal energy of the system.
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5. • A piston slides to the position where the external pressure
and the gas pressure are equal. As long as the external
pressure is constant, so must be the gas pressure.

6. A constant-pressure process appears
on a pV diagram as a horizontal line.
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7. • For all ideal-gas
processes, the work is
the area under the pV
graph between Vi and
Vf.
• Fig (a), shows work
done by the gas for an
isobaric process.

8. Slide 12-8
•Relation between p,V and T:
P1V1/T1=P2V2/T2 but p1=p2,
So,
V1/T1=V2/T2
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1. If the pressure is held constant, the
boundary work equation becomes

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12. THANK YOU
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