This ppt is more useful for Civil Engineering students. I have prepared this ppt during my college days as a part of semester evaluation . Hope this will help to current civil students for their ppt presentations and in many more activities as a part of their semester assessments. I have prepared this ppt as per the syllabus concerned in the particular topic of the subject, so one can directly use it just by editing their names.

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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