Which of the following is incorrect?

Options

A. A thermodynamic system refers to any part of the real world under study.
B. Eveything that is not a part of the system and can interact with it is called its surroundings.
C. The surrounding can affect the system by the exchange of matter or energy.
D. A system and its surrounding are always separated by real boundaries across which matter and energy may be exchanged.

Answer

D

Explanation

The word systems is very commonly used in thermodynamics. If we study the reaction between two substances `A` and `B` the reaction mixture of `A` and `B` consittutes the system. All the rest (i.e., beaker is kept) are part of the surrounding. A system and its surrounding are always separated by boundaries which may be real or imaginary.