## work done on and by the system

$w=-P\Delta V$
and
$w=-\int_{V_{1}}^{V_{2}}PdV=-nRTln\frac{V_{2}}{V_{1}}$

Hector Acosta Discussion 1H
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### work done on and by the system

when is work lost, when the system does work or work is done on the system?

Abdullah2I
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### Re: work done on and by the system

Yeah, i have the same question.

Cynthia Tsang
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### Re: work done on and by the system

Work is negative when the system does work. Work is positive when work is done on the system.

Cali Rauk1D
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### Re: work done on and by the system

W is negative if work is done on the system and w is positive if work is done by system

Sophia Kim 1C
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### Re: work done on and by the system

I'm fairly certain that work is positive (energy gained) when work is done BY the system and work is negative (energy lost) when work is done ON the system

Nehal Banik
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### Re: work done on and by the system

WORK itself is NEGATIVE when the system itself performs work on the surroundings, therefore logically WORK will be POSITIVE when work is done on the system.

Manasvi Paudel 1A
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### Re: work done on and by the system

When work is being done by the system, w will be positive. When work is being done on the system, w will be negative.

Justin Chu 1G
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### Re: work done on and by the system

Work is positive when work is done by the system and negative when work is done on the system.

Kayla Ikemiya 1E
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### Re: work done on and by the system

When work is positive, work is done on the system. When work is negative, work is done by the system.

Nathan Tu 2C
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### Re: work done on and by the system

Work is a method of transferring energy. When work is done on the system, it has a positive value because the internal energy increases. When work is done by the system, it has a negative value because the internal energy of the system decreases.

Bansi Amin 1D
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### Re: work done on and by the system

When given a word problem, how can we tell that work is being done on the system or by the system?

Joyce Gu 1E
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### Re: work done on and by the system

Bansi Amin 1D wrote:When given a word problem, how can we tell that work is being done on the system or by the system?

Work to system --> -w
Work from system --> +w

Troy Tavangar 1I
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### Re: work done on and by the system

When w is negative, work is by the system whereas when work is positive, work is done on the system.