Chemical Engineering - Chemical Engineering Thermodynamics - Discussion
Discussion Forum : Chemical Engineering Thermodynamics - Section 1 (Q.No. 1)
1.
Maximum work that could be secured by expanding the gas over a given pressure range is the __________ work.
Discussion:
24 comments Page 2 of 3.
Sadam Shahani said:
9 years ago
In the first law of thermodynamics:
1. v is inversely proportional to pressure.
2. Expansion means increasing volume which means a decrease in pressure.
3. Pressure decreasing indicates that there is no change in temperature.
4. Increasing volume means Max work (w=Pv).
Hope this will be cleared. Thank you.
1. v is inversely proportional to pressure.
2. Expansion means increasing volume which means a decrease in pressure.
3. Pressure decreasing indicates that there is no change in temperature.
4. Increasing volume means Max work (w=Pv).
Hope this will be cleared. Thank you.
Milan Bhatt said:
9 years ago
Why not adiabatic?
Please explain me.
Please explain me.
Shubham tiwari said:
10 years ago
Area under the PV diagram gives work. The area for isothermal process is greater than that for adiabatic and isentropic process.
Remington said:
1 decade ago
dU = Q+W.
For T = K, dU = CvdT = 0.
-Q = W , hence heat input equals work output.
For T = K, dU = CvdT = 0.
-Q = W , hence heat input equals work output.
(1)
Raj musale said:
1 decade ago
Consider a system possessing a piston-cylinder arrangement. Now are asked that; which process requires maximum heat (Q) to raise the piston.
So it is clear that if the piston-cylinder arrangement is considered as isothermal; then I have to provide maximum heat (Q) to the system. So the answer is (A).
So it is clear that if the piston-cylinder arrangement is considered as isothermal; then I have to provide maximum heat (Q) to the system. So the answer is (A).
Engr. Adeyemo, Festus said:
1 decade ago
Boyle's law proves the answer is (A) ISOTHERMAL. For pressure to increase significantly and bringing about maximum work then absolute temperature must be held constant.
Under this Isothermal process we have Maximum Work Reversible,
i.e Wr = P1V1*ln (P2/P1).
Under this Isothermal process we have Maximum Work Reversible,
i.e Wr = P1V1*ln (P2/P1).
Blaise Paschal said:
1 decade ago
Adiabatic lines on a PV diagram are always steeper than isothermal lines. This means that if we change the pressure by a specific amount the change is volume is always going to be more for an isothermal process then an adiabatic process.
Arvind said:
1 decade ago
Temperature is constant pressure is vary inversely proportional to volume.
Siva said:
1 decade ago
Both adiabatic and isentropic are the same process then the alternate is isothermal.
Ramani said:
1 decade ago
Here in this process temperature and pressure changes with respect to time. So process is isothermal.
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