Is irreversible work greater than reversible work?

So reversible work done is always more than any irreversible work done. Because these frictional losses can not be recovered in irreversible process and there are no frictional losses in reversible process.

Why is more work done in reversible process?

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.

What is the relation between work obtained in an reversible and irreversible process?

Since the work is equal to the derivative, or area under the curve, the work of the reversible work is higher than the work of the irreversible work. So, in reality, the work done (since reversible work doesn’t actually exist) is lower than the ideal, reversible, situation.

How does a reversible process differs from an irreversible process in terms of work done and entropy?

The second law of thermodynamics states that in a reversible process, the entropy of the universe is constant, whereas in an irreversible process, such as the transfer of heat from a hot object to a cold object, the entropy of the universe increases.

Can irreversible work negative?

Finally, let us consider a reversible process in which a system completes a pressure–volume cycle. The system traverses a closed path in the pressure–volume plane. Such a path is depicted in Figure 8. We let the smallest and largest volumes reached during the cycle be Vℓ and Vh, respectively.

Is work done irreversible process?

In an irreversible compression the work done by the surroundings on the system is larger than in a reversible compression between the same states. than the pV-work done in a reversible process between the same initial and final state. reversible compression between the same states.

What is the difference between reversible and irreversible changes?

A change which cannot happen backward, that is, it cannot be reversed is called an irreversible change….Difference between physical and chemical changes.

Physical changes	Chemical changes
Mostly reversible changes.	All are irreversible changes.
A new substance is not formed.	A new substance is formed.

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 reversible and irreversible work?

A reversible process is one in which both the system and its environment can return to exactly the states they were in by following the reverse path. An irreversible process is one in which the system and its environment cannot return together to exactly the states that they were in.

Why is the reversible work greater than the irreversible work?

The reversible work greater than irreversible work beacuse 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 process and irreversible process?

$\\begingroup$ 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.

Is entropy change equal to the quantity for an irreversible process?

If the process is not reversible, we obtain less work (see IAW notes) than in a reversible process, , so that for the irreversible process, There is no equality between the entropy change and the quantity for an irreversible process. The equality is only applicable for a reversible process.

How do you calculate the work output of an irreversible process?

Whether the process is reversible or irreversible, the equation to calculate work out put is one and the same: Work output =integral (Pext x dV). Work output and work input have opposite signs since dV has opposite signs in the two cases.For an irreversible process we cannot do that substitution for Pext, and hence,…