Question

In thermodynamics, a process is called reversible when [AIIMS 2001]
A) Surroundings and system change into each other B) There is no boundary between system and surroundings C) The surroundings are always in equilibrium with the system D) The system changes into the surroundings spontaneously

Answer 1

C ) The surroundings are always in equilibrium with the system.....

Answer 2

Answer:

The reversible process in thermodynamics occur when "The surroundings are always in equilibrium with the system".

Option (C)

Explanation:

• When a process is carried out imperceptibly slowly in such a way that each step remains in equilibrium with the previous step and the process could be reversed at any stage it is called reversible process.
• when the "process" is not fulfilled then it is defined as irreversible process. A system is in a state of thermodynamic equilibrium when the "state variables remain constant" throughout the system.
• Chemical thermodynamics deals with the energy change involved in chemical transformations.
• So the system should be equilibrium throughout the process.