An isolated system is that system in which

Options

A. There is not exchange of enegry with the surroundings.
B. There is exchange of mass nad enegry with the surroundings.
C. There is no exchange of enegry and mass with the surroundings.
D. There is exchange of mass with the surroundings.

Explanation

To answer the question "An isolated system is that system in which," we need to define what an isolated system is in thermodynamics. Here’s a step-by-step solution:

### Step 1: Define an Isolated System
An isolated system is a type of thermodynamic system that does not exchange either matter or energy with its surroundings. This means that the system is completely sealed off from the external environment.

### Step 2: Characteristics of an Isolated System
- **No Matter Exchange**: An isolated system does not allow any mass to enter or leave the system. This means that the number of particles within the system remains constant.
- **No Energy Exchange**: An isolated system also does not exchange energy in the form of heat or work with the surroundings. This implies that the total energy of the system remains constant.
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