Chapter 11.2, Problem 25SSC

To determine

To explain: Whether the Earth is closed and isolated system or not.

Answer to Problem 25SSC

Earth is a closed system but it is not an isolated system.

Explanation of Solution

Introduction:

Closed system:

A closed system are those systems in which there will be an exchange of energy between the system and its surroundings but there is no interchange of matter between the system and its surroundings.

Isolated system:

It is a thermodynamic system which is completely sealed so that it doesn’t interact with the other systems. Hence, there is no interchange of matter and energy between an isolated system and its surroundings.

Earth is considered to be a closed system. This is because, Earth receives an enormous amount of energy from the Sun (Sun is the key source of light for the planet Earth). But there is no interchange of any matter between the Earth and its surroundings. Earth’s atmosphere inhibits any matter going away from the Earth.

Earth is not an isolated system. This is because, the electromagnetic radiations from the Sun reaches the Earth continuously, which is the main source of light to Earth. And also, the gravitational forces of Sun, other stars, and other planets are continuously acting upon the Earth.

Conclusion:

Therefore, Earth is a closed system but not an isolated system.