Category: 2. Thermodynamic Processes

The three types of thermodynamic systems are: In such systems, multiple thermodynamics processes can take place. These processes are classified into various types. 

A cyclic process is a thermodynamics process in which a system goes through a cyclic change during which all its properties change periodically but return to their initial state ultimately and the total change in the internal energy of the system remains zero. 

During a thermodynamics process, if there is an increase in the entropy of the system then the system cannot return to its original state. The surroundings will also go through some thermodynamic changes and will not be able to return to their original or initial state and this type of process is called irreversible process. 

The thermodynamics process that can be reversed, that is, brought back into the initial state by very small changes in the properties of the system is a reversible process. During a reversible process, there is no increase in the entropy of the system and the whole system is in perfect equilibrium with the surroundings. The work…

In an adiabatic process, no heat is exchanged between the surroundings and the system. PVγ = K or constant Since, W = ∫PdV Using the value of P, W = KVf∫VidVVγ W = KVf1−γ−Vi1−γ1−γ1−γ−1−γ1−γ According to the first law of thermodynamics,  Q = ΔU + W Since, Q= 0, ΔU = -W

In isochoric thermodynamic process, the volume of the system does not change. An example of such a process is gas inside a closed container. The work done by such a system is zero. However, if the system is heated, there will be changes in the internal energy of the system. According to the first law of thermodynamics,  ΔQ =…

A thermodynamics process in which the pressure of the system does not change with time is called an isobaric process. Work done, W = P (VB – VA) If ΔV = positive, the work done will be positive. If ΔV = negative, the work done will be negative.

The Isothermal Process is the process in which the temperature remains constant in the system. Some heat transfer does take place but it is typically at an extremely slow rate which enables it to attain thermal equilibrium.  Since, W = ∫PdV From Gas Law,  PV = nRT P = nRT/V  Putting the value of P, we get: W…

Many different parameters can be used to express the state of any thermodynamic system such as temperature, pressure and volume, and internal energy. The value of any of these parameters can be found if two out of three parameters are fixed. We can do so by using the equation, PV = RT.  Types of Thermodynamic Processes