Question

The total energy of an isolated system:
1. cannot change
2. can only increase
3. can only decrease
4. may increase or decrease depending the nature of the system

Answer 1

Correct Answer - Option 1 : cannot change

The correct answer is option 1) i.e. cannot change

CONCEPT:

• Law of conservation of energy: The law of conservation of energy states that energy can neither be created nor be destroyed. It can only be transformed from one form to another. 
  • The total energy of an isolated system always remains constant. 
• An isolated system is a thermodynamic system that cannot transfer or exchange energy or matter between the system and surrounding.

EXPLANATION:

• From the law of conservation of energy, the total energy of an isolated system cannot change.