work
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work
If we are calculating work on a system and W is a positive number, does that mean work is done by the system or work is done on the system? What is the difference between these two?
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Re: work
Work is being done on the system when w is positive, since the internal energy (U) of the system increases.
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Re: work
When the value of w is positive this means work is being done on the system (ex. is compression). This is because the formula for work is w=-PdeltaV so when there is compression from work being done on the system, the negatives will cancel out and the w becomes positive. Therefore, when work is being done by the system, this is a negative value because of expansion.
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Re: work
The work done on the system will be positive if a system is compressed and delta-V is negative
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Re: work
When work is (+), then work is being done ON the system.
When work is (-), then work is being done BY the system.
When work is (-), then work is being done BY the system.
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