## What is the entropy change during adiabatic reversible expansion process?

. Thus the entropy change of the universe during reversible processes is zero. we see that the entropy change of a system during for a reversible, adiabatic process is zero.

What happens to entropy during adiabatic expansion?

According to thermodynamics, a process is said to be adiabatic if no heat enters or leaves the system during any stage of the process. As no heat is allowed to transfer between the surrounding and system, the heat remains constant. Thus The change in entropy between the S1 and S2 would be equal to zero.

### What is a reversible adiabatic expansion?

The reversible adiabatic process is also called an Isentropic Process. It is an idealized thermodynamic process that is adiabatic and in which the work transfers of the system are frictionless; there is no transfer of heat or of matter and the process is reversible.

What happens to entropy in irreversible adiabatic process?

Hence in an adiabatic irreversible process entropy increases.

#### Why does entropy remains constant in a reversible adiabatic process?

In thermodynamics, an isoentropic process is an idealized thermodynamic process that is adiabatic and in which the work transfers of the system are frictionless; there is no transfer of heat or matter and the process is reversible. Hence, Entropy of a substance remains constant during reversible adiabatic change.

Is entropy zero in adiabatic process?

The entropy change in an adiabatic process is zero.

## Does entropy change in a reversible process?

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.

What is an example of a reversible adiabatic process?

Many engineering devices such as pumps, turbines, diffusers and nozzles are adiabatic in nature. These systems approach isentropic nature when the internal irreversibilities such as friction are reduced. In thermodynamics, an isentropic process is essentially used to denote an internally reversible adiabatic process.

adiabatic process occurs without heat transfer with its surrounding.In isentropic process entropy remains constant,it is known as reversible adiabatic process. adiabatic process occurs without heat transfer with its surrounding.In isentropic process entropy remains constant,it is known as reversible adiabatic process.

Does entropy change in adiabatic process?

Adiabatic processes are characterized by an increase in entropy, or degree of disorder, if they are irreversible and by no change in entropy if they are reversible. Adiabatic processes cannot decrease entropy.

#### Why is entropy of reversible process always zero?

Change in entropy for a system undergoing only reversible process may not be necessarily be zero. Now for a reversible process, since the process is really slow we neglect the friction (also called as Internal Irreversibility). Thus Entropy generation = 0.

When a gas undergoes reversible adiabatic expansion entropy change of the gas is?

When a gas undergoes a reversible adiabatic expansion, its entropy remains constant even though the volume increases.