Why the work done in isothermal reversible expansion is more than that of irreversible expansion?
The reason why more work is done in a reversible process than an irreversible process is in an irreversible process entropy is generated within the gas whereas in a reversible process entropy is not generated.
Why is irreversible compression more work?
Work done during any reversible process becomes maximum because frictional losses are not considered there, no other loss of energy of the system. We know that work done in any reversible expansion process is W= Pdv. Here the pressure is a function of volume and DV is changed in volume.
Why is work done in adiabatic compression more than the work done in isothermal compression?
Area under p-v curve gives work done. Since slope of adiabatic process is y(gamma) times isothermal process whose slope is (-p/v). Therefore area under adiabatic process is more compared with isothermal. Hence work done in adiabatic compression is more then isothermal compression.
Why is irreversible work greater than reversible?
The key feature why the irreversible work is smaller than the reversible work is the magnitude of the external pressure against which the irreversible work is done against. If you were to increase the external pressure by a factor of two then the irreversible work would be greater.
What is the difference between reversible and irreversible work?
Hint: We have to find the difference between the reversible process and irreversible process….Complete answer:
| Reversible process | Irreversible process |
|---|---|
| (2) Reversible processes can take place either in forward direction or in backward direction. | (2) Irreversible processes can take place only in one direction. |
What is the difference between reversible and irreversible process?
A reversible process is a change that can be retraced in a reverse (opposite) direction. An irreversible process is a change that cannot be retraced in a reverse (opposite) direction. Reversible changes are very slow and there is no loss of any energy in the process.
Why is reversible work less than irreversible?
Why is isothermal work more than adiabatic work?
Area under the pressure-volume curve is directly proportional to the work done. In the isothermal process, the heat is given by surrounding for work done whereas the heat change is zero in the adiabatic process so, the work done in the isothermal process is greater than the work done in the adiabatic process.
Why is isothermal compression more efficient?
In the isothermal compression, there is heat flow out of the gas. The heat being let out keeps the pressure lower which makes it easier to achieve the same volume change (ie less work) than in the adiabatic case.
What is the difference between reversible and irreversible machine?
1. Reversible machine : A machine which is capable of doing work in the reverse direction even after the removal of effort ,load get lifted is called Reversible machine. 2. Non – Reversible machine : A machine which is not capable of doing work in the reverse direction is called Non – Reversible machine.
What is the difference between reversible and irreversible changes give two example for each?
Reversible Change –-A change that can be reversed is called a reversible change. The freezing of ice and the melting of wax are examples of reversible change. Irreversible Change–A change that cannot be reversed is called an irreversible change.
Why does a reversible process do the most work?
Reversible processes do the most work, because they have to push against more external pressure. Since w = -PΔV, a greater value for the external pressure (P) results in a higher (more negative) work.