How is the internal energy of a system affected if work is done by the system?
Understand the Problem
The question is asking about the relationship between the work done by a system and its internal energy. It requires an understanding of the first law of thermodynamics, which states that if a system does work, its internal energy decreases unless energy is added to the system in the form of heat.
Answer
Internal energy decreases.
The internal energy of a system decreases when work is done by the system, assuming no heat transfer occurs.
Answer for screen readers
The internal energy of a system decreases when work is done by the system, assuming no heat transfer occurs.
More Information
When work is done by the system, energy is expended, leading to a reduction in internal energy unless compensated by heat transfer from the surroundings.
Tips
A common mistake is to confuse the effects of work done by the system with work done on the system. Remember that work done by the system reduces internal energy, while work done on the system increases it.
Sources
- First law of thermodynamics explains internal energy change - brainly.com
- Discussion on work done by/on the system - quora.com
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