Are all irreversible process spontaneous Why?

Ernest Z. Spontaneous processes are irreversible because they can be reversed only by taking a different path to get back to their original state. A reversible process can take the same path to return to its original state. An irreversible process must take a different path to get back to its original state.

Are non-spontaneous processes reversible or irreversible?

Reversible reactions are not a limiting case of spontaneous reactions and non-spontaneous reactions. Spontaneous reactions and non-spontaneous reactions are limiting cases of reversible reactions.

Are all real processes are irreversible?

All real processes (with the possible exception of superconducting current flows) are in some measure irreversible, though many processes can be analyzed quite adequately by assuming that they are reversible.

Are any processes reversible?

Fundamentals of Equilibrium Thermodynamics Reversible processes is differentially removed from equilibrium with no (appreciable) internal temperature, pressure, and velocity changes. A reversible process can be reversed at any point by external conditions.

Why are all real processes irreversible?

Four of the most common causes of irreversibility are friction, unrestrained expansion of a fluid, heat transfer through a finite temperature difference, and mixing of two different substances. These factors are present in real,irreversible processes and prevent these processes from being reversible.

Which process is irreversible?

Irreversible processes are characterized by the flow of fluids with friction, and sliding friction between any two matters. An example of an irreversible process is electric current flow through a conductor with a resistance. An example of an irreversible process is magnetization or polarization with hysteresis.

Are all non spontaneous processes endothermic?

Therefore, spontaneity does not dictate whether a reaction is endothermic or exothermic. A spontaneous reaction is more likely to be exothermic but can be endothermic. Non-spontaneous reactions are more likely to be endothermic but can be exothermic.

Are all isothermal processes reversible?

Just being isothermal does not necessarily make a process reversible. There are plenty of isothermal processes that are not reversible. In the Carnot cycle , all four legs are reversible processes.

Which processes are irreversible?

Some examples of irreversible processes are electric current flow through a conductor with a resistance, magnetization or polarization with hysteresis, inelastic deformation, fluid flow with shock wave, and mixing of fluid with different temperatures, pressures, and/or compositions.

Are all isobaric processes irreversible?

It is not necessary that all isobaric processes are reversible. Reversiblity is a very theoretical concept. Most reactions are irreversible. But, yes isobaric processes are mostly reversible because work done is proportional to volume and not pressure as in isobaric process pressure is constant.

Are all quasi static processes reversible?

The word quasi static actually means almost static. On a whole it can be said that all reversible process are quasi static, but all quasi static process are not reversible.

Are all reversible processes isentropic?

Isentropic process: entropy is a constant, Ds=0. A reversible, adiabatic process is always isentropic since no entropy generation due to irreversibilities (sgen=0) and no change of entropy due to heat transfer (ds=? Q/T=0).

What is the difference between spontaneous and irreversible processes?

Spontaneous processes are irreversible because they can be reversed only by taking a different path to get back to their original state. A reversible process can take the same path to return to its original state. An irreversible process must take a different path to get back to its original state.

How do you know if a process is reversible or irreversible?

Irreversible process. An irreversible process increases the entropy of the universe. Because entropy is a state function, the change in entropy of the system is the same, whether the process is reversible or irreversible. The second law of thermodynamics can be used to determine whether a process is reversible or not.

What happens to entropy when a process is irreversible?

An irreversible process increases the entropy of the universe. Because entropy is a state function, the change in entropy of the system is the same, whether the process is reversible or irreversible. The second law of thermodynamics can be used to determine whether a process is reversible or not. Intuitively, a process is reversible

Can a system that undergoes an irreversible process ever return to state?

A system that undergoes an irreversible process may still be capable of returning to its initial state. However, the impossibility occurs in restoring the environment to its own initial conditions. An irreversible process increases the entropy of the universe.