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Which law states that the total energy of an isolated system remains constant?

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Question: Which law states that the total energy of an isolated system remains constant?

Options:

  1. First law of thermodynamics
  2. Second law of thermodynamics
  3. Zeroth law of thermodynamics
  4. Third law of thermodynamics

Correct Answer: First law of thermodynamics

Solution: 

The first law of thermodynamics states that the total energy of an isolated system remains constant.

Which law states that the total energy of an isolated system remains constant?

Practice Questions

Q1
Which law states that the total energy of an isolated system remains constant?
  1. First law of thermodynamics
  2. Second law of thermodynamics
  3. Zeroth law of thermodynamics
  4. Third law of thermodynamics

Questions & Step-by-Step Solutions

Which law states that the total energy of an isolated system remains constant?
Correct Answer: First law of thermodynamics
  • Step 1: Understand what an isolated system is. An isolated system is one that does not exchange energy or matter with its surroundings.
  • Step 2: Learn about energy. Energy can change forms (like from potential to kinetic) but the total amount remains the same in an isolated system.
  • Step 3: Identify the law that describes this concept. The first law of thermodynamics is the law that states energy cannot be created or destroyed, only transformed.
  • Step 4: Conclude that the first law of thermodynamics means the total energy of an isolated system remains constant.
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