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Just to clarify, when heat is transferred from the system and work done by the system, does it carry a negative sign to show that the energy of the system decreases in both cases? At first, I assumed it would be only the system, but my peers are saying it's both.
When heat is transferred from the system and work is done by the system, both heat and work are negative. This is because when heat is transferred from the system, the system loses heat (hence the negative q). When work is done by the system, the system is losing energy (hence work is negative).
Aman Sankineni 2L wrote:Heat transfer to a system is positive, and heat transfer from a system is negative. W is positive if work is done by the system, and negative if work is done on the system.
So I would say that in this case, both are negative.
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