Question

What Is "Pen Name"?​

Answer 1

Pen name is referred to a name kept by a friend or a close one , in short term , referred to as a nick name !

Answer 2

Answer:

$\sf{No}$

Thermodynamic equilibrium, condition or state of a thermodynamic system, the properties of which do not change with time and that can be changed to another condition only at the expense of effects on other systems.