InoOP Chem

https://open.spotify.com/episode/5iFeiw83aHowlxZW9uF7Ni?si=nIlWVxRcSn2t86WVptLq_Q&dl_branch=1

Cyclic process is a process when a system returning back into its original state after completing a series of changes . then, the system said to be completed a cycle and, the entire process is called cyclic process.

state functions like internal energy ‘U’ depends only upon its state initial final  or final state. In a cyclic process, the net change in internal energy is zero , i.e., ΔU = 0

According to the first law of thermodynamics , during any isothermal reversible expansion of an ideal gas,

ΔU = q – w

since, ΔU = 0, ∴q – w = 0 or q = w

i.e., the work done is exactly equal to the heat absorbed by the system.

It is very important to note here that although the heat has completely been converted into work at the same time the process is accompained by an increase in volume of the gas meaning thereby that the system has undergone a change.

• if the series of changes in the cycle is conducted by keeping the temperature constant , the cycle is known as isothermal cycle.

• On the other hand, if the changes in the cycle are brought about reversibly, the cycle is known as reversible cycle.

It is very important to note here that the concept of reversible cycle process is mainly theoritical and imaginary but is of great importance in deriving certain important relationships in thermodynamics.