# How do you determine if a process is reversible or irreversible thermodynamics?

## How do you determine if a process is reversible or irreversible thermodynamics?

Reversible Process: when every step for the system and its surroundings can be reversed. A reversible process involves a series of equilibrium states. Irreversible Process – when the direction of the arrow of time is important. IRREVERSIBILITY DEFINES THE CONCEPT OF TIME.

What is the formula of reversible process?

So why is the concept of a reversible process so important? ΔU=q+w. Each combination of q and w represents a different pathway between the initial and final states. Thus when a process is carried out reversibly, the w-term in Equation 13.4.

What are reversible and irreversible processes in thermodynamics?

In terms of thermodynamics, a reversible process is where the participants go back to its initial form by inculcating minor or negligible changes in their surroundings. Contrarily, an irreversible process is a naturally occurring phenomenon, which does not go back to its original state.

### How do you calculate irreversible process?

1. in irreversible isothermal expansion, formula for work done is W=P(external)x change in volume.
2. For an irreversible expansion process, a crude approximation to the force exerted by the gas on the piston (where the work is done) can be provided by the equation FA=Pext=nRTV−kVdVdt.

What are the differences between reversible and irreversible process?

The basic difference between reversible and irreversible processes is that in the reversible process the system remains in thermodynamic equilibrium, while in the irreversible process the system does not remain in thermodynamic equilibrium.

What is the formula for irreversible isothermal expansion?

For isothermal reversible and irreversible changes; equation 1 can be expressed as: Isothermal reversible change: q = -w = pex(Vf-Vi) Isothermal reversible change: q = -w = nRTln (Vf/Vi) = 2.303 nRT log (Vf/Vi)

#### What is an irreversible process in thermodynamics?

Fundamentals of Equilibrium Thermodynamics Irreversible processes are actual processes carried out in finite time with real substances with internal temperature, pressure, and/or velocity changes causing energy dissipation, such as viscous dissipation.

What is the basic difference between reversible cycle and irreversible cycle?

How do you calculate reversible expansion?

Isothermal reversible change: q = -w = pex(Vf-Vi) Isothermal reversible change: q = -w = nRTln (Vf/Vi) = 2.303 nRT log (Vf/Vi)…Isothermal Irreversible Expansion.