Question

An isolated system is a system in which

• A. there is no exchange of energy with the surrounding.
• B. there is exchange of mass and energy with the surrounding.
• C. there is no exchange of energy and mass with the surrounding.
• D. there is no exchange of mass with the surrounding.

Answer 1

The correct option is C there is no exchange of energy and mass with the surrounding.

An isolated system is a thermodynamic system that neither exchanges energy nor matter (mass) with its surroundings.
$\Rightarrow$An isolated system differs from a closed system from standpoint of the transfer of energy. Closed systems are only closed to material transfer, energy can be exchanged across the system's boundaries.
$\therefore$ correct answer is option $\left(c\right)$.