Question

In which of the basic thermodynamic processes work done is always zero?

Answer 1

Hint: In order to answer this question, first we will mention the name of the thermodynamic process in which work done is always zero and then we will give the accurate reason behind it. And then we will also discuss the required thermodynamic process.

Complete answer:
In the Isochoric process, the work done is always zero. Isochoric process is a thermodynamic process that takes place in a constant volume.
An isochoric process is one in which the volume remains constant ( \[V = constant\] ), implying that the system performs no work. As a result, any heat energy given to the system from outside will be absorbed as internal energy in the simple two-dimensional system.
An isochoric process, also known as a constant-volume process, isovolumetric process, or isometric process, is a thermodynamic process in which the volume of the closed system undergoing the process remains constant during the process. The heating or cooling of the contents of a sealed, inelastic container is an example of an isochoric process: The thermodynamic process is the addition or removal of heat; the closed system is established by the isolation of the container's contents; and the container's inability to deform imposes the constant-volume constraint. The isochoric process in this case should be quasi-static.
Constant volume, i.e., \[V = 0\] , characterises an isochoric thermodynamic quasi-static process. Because pressure-volume work is defined by pressure, the process does not perform such work:
$W = P\Delta V$
where, $P$ is the pressure.

Note: There is the another situation in which work done is zero such that- when the force acts in the opposite direction of the motion, when a force works in the opposite direction of motion, the angle formed between the force and the motion is \[{180^\circ }\] , hence, in this situation work done is always zero.