# Which one is the thermodynamically reversible process?

May 8, 2020

## Which one is the thermodynamically reversible process?

Both isothermal and adiabatic processes sketched on a pV graph (discussed in The First Law of Thermodynamics) are reversible in principle because the system is always at an equilibrium state at any point of the processes and can go forward or backward along the given curves.

### What are the examples of irreversible process in thermodynamics?

Examples of irreversible processes

• Birth (Childbirth in humans)
• Ageing.
• Death.
• Heat transfer through a finite temperature difference.
• Friction.
• Plastic deformation.
• Flow of electric current through a resistance.
• Magnetization or polarization with a hysteresis.

#### What are examples of reversible and irreversible processes?

6. 8. 3 Examples of Reversible and Irreversible Processes

• Frictionless movement.
• Restrained compression or expansion.
• Energy transfer as heat due to infinitesimal temperature nonuniformity.
• Electric current flow through a zero resistance.
• Restrained chemical reaction.

Can a thermodynamically reversible process occur in nature?

From a perspective of a pure mathematician you are right: no thermodynamic process is really reversible, and closed/isolated systems do not exist, strictly speaking. However a good physicist is aware that reversible thermodynamic processes and closed/isolated systems are often very good approximations of the reality.

What is reversible process example?

Some examples of reversible processes are uniform and slow expansion or compression of a fluid, such as fluid flows in a well-designed turbine, compressor, nozzle, or diffuser. Reversible processes is differentially removed from equilibrium with no (appreciable) internal temperature, pressure, and velocity changes.

## Is Carnot cycle reversible?

The Carnot heat-engine cycle described is a totally reversible cycle. That is all the processes that compose it can be reversed, in which case it becomes the Carnot refrigeration cycle.

### What is reversible change give example?

A reversible change might change how a material looks or feels, but it doesn’t create new materials. Examples of reversible reactions include dissolving, evaporation, melting and freezing.

#### Why is no process truly reversible?

Having been reversed, it leaves no change in either the system or the surroundings. Since it would take an infinite amount of time for the reversible process to finish, perfectly reversible processes are impossible.

What is reversible process with example?

Some examples of reversible processes are uniform and slow expansion or compression of a fluid, such as fluid flows in a well-designed turbine, compressor, nozzle, or diffuser. • Reversible processes is differentially removed from equilibrium with no (appreciable) internal temperature, pressure, and velocity changes.

What is reversible cycle?

In a reversible cycle, a cyclical reversible process, the system and its surroundings will be returned to their original states if one half cycle is followed by the other half cycle.

## What are reversible and irreversible processes in thermodynamics?

The main difference between reversible and irreversible process is that a reversible process is a thermodynamic process that can be reversed to get the initial state whereas an irreversible process is a thermodynamic process that cannot be reversed to obtain the initial state of the system. References:

### Why is isothermal process a reversible process?

Isothermal processes are considered reversible processes, because if you’ve completed a process (for example, an isothermal expansion) you could run the same process in reverse (an isothermal compression) and return the system to its original state .

#### What is an irreversible process?

An irreversible process is a thermodynamic process that departs from equilibrium. In terms of pressure and volume, it occurs when the pressure (or the volume) of a system changes dramatically and instantaneously that the volume (or the pressure) do not have the time to reach equilibrium.

What are reversible changes?

Reversible changes. Reversible changes are changes that can be undone or reversed. Melting, freezing, boiling, evaporating, condensing, dissolving and also, changing the shape of a substance are examples of reversible changes.