Where is entropy from?

Carnot cycle
Entropy arises directly from the Carnot cycle. It can also be described as the reversible heat divided by temperature. Entropy is a fundamental function of state.

What is s generation in thermodynamics?

Sgen measures the effect of irreversibilities present within the system during a process. Its value depends on the nature of the process and not solely on the start and end states. Hence, it is not a property.

Can entropy be created?

Entropy is created by irreversible processes that involve viscous friction, mixing between flows of different properties, heat transfer across a finite temperature difference, or nonequilibrium changes like shock waves.

Why is entropy generation important?

It is well known that entropy generation has a crucial role to diminish the required sources of energy of the system. In order to get better efficiency and performance in most engineering and industrial applications, the key concern of the researchers is to lessen the entropy generation.

Why was entropy invented?

The concept of entropy developed in response to the observation that a certain amount of functional energy released from combustion reactions is always lost to dissipation or friction and is thus not transformed into useful work. Clausius continued to develop his ideas of lost energy, and coined the term entropy.

Who came up with entropy?

physicist Rudolf Clausius
The concept of entropy provides deep insight into the direction of spontaneous change for many everyday phenomena. Its introduction by the German physicist Rudolf Clausius in 1850 is a highlight of 19th-century physics.

Does heat transfer generate entropy?

(a) Heat transfer from a hot object to a cold one is an irreversible process that produces an overall increase in entropy.

Can you create and destroy entropy?

Entropy is not a conserved quantity. It can be created. In every irreversible cyclic process it gets created. However, entropy cannot be destroyed.

Is entropy generation a path function?

Entropy generation is a path function because it depends upon the how long we are taking any process. It also depends upon the heat which is to be transfered during the process and we know that heat is path function.

Who first defined entropy?

What is entropy and how is it generated?

Entropy is generated anytime that heat enters or exists a system. Heat is positive when entering a system and negative when exiting a system. Heat from a high heat source enters the system at the temperature of the high heat source.

Why is there no entropy generation in the reservoirs?

The entropy of each of the reservoirs changes, because one loses heat and the other gains heat. So their states change, but, since they are internally reversible, there is no entropy generation within the reservoirs. So, where does the entropy generation occur?

Can the value of entropy generation be negative?

The value of entropy generation cannot be negative, however the changes in entropy of the system may be positive, negative or zero. The entropy of an isolated system during an irreversible process always increases, which is called the increase of entropy principle. Entropy change can be determined without detailed information of the process.

What is s=q/t for thermodynamic entropy?

Writing about Clausius’ definition S=Q/T for thermodynamic entropy for a reversible process. It has no relationship to disorder nor is there any unusable energy. Entropy is generated anytime that heat enters or exists a system. Heat is positive when entering a system and negative when exiting a system.