When a system performs work on the surroundings,the work is reported with a negative sign.

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According to the convention used in thermodynamics, work done by the system on the surroundings is reported with a negative sign. This is because work is the transfer of energy, and it is conventionally regarded as positive when the energy is transferred to the system and negative when it is transferred to the surroundings.

When a System Performs Work on the Surroundings,the Work Is