In a closed system, if the internal energy increases, what can be said about the

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Question: In a closed system, if the internal energy increases, what can be said about the work done on the system?

Options:

Correct Answer: Work is done on the system.

Solution:

If the internal energy of a closed system increases, it indicates that work is done on the system.

In a closed system, if the internal energy increases, what can be said about the work done on the system?

In a closed system, if the internal energy increases, what can be said about the work done on the system?

Step 1: Understand what a closed system is. A closed system can exchange energy but not matter with its surroundings.
Step 2: Know what internal energy means. Internal energy is the total energy contained within the system.
Step 3: Recognize that an increase in internal energy means the system has gained energy.
Step 4: Remember the relationship between work and energy. If work is done on the system, it adds energy to the system.
Step 5: Conclude that if the internal energy increases, it means work has been done on the system.

First Law of Thermodynamics – The internal energy of a closed system is related to the heat added to the system and the work done on or by the system.
Work-Energy Principle – Work done on a system can increase its internal energy, depending on the heat exchange with the surroundings.