when is w=0 and when is q=0?

isochoric/isometric:
isothermal:
isobaric:

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Lisa Werner 2F
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when is w=0 and when is q=0?

Postby Lisa Werner 2F » Sat Mar 16, 2019 10:32 pm

when is w=0 and when is q=0? what are the key words that indicate these two conditions?

Chem_Mod
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Re: when is w=0 and when is q=0?

Postby Chem_Mod » Sat Mar 16, 2019 10:37 pm

Work is 0 when there is no change in volume (isochoric). Heat is 0 for an adiabatic process, which will usually be explicitly stated.

Petrina Kan 2I
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Re: when is w=0 and when is q=0?

Postby Petrina Kan 2I » Sun Feb 02, 2020 11:10 pm

What is an adiabatic process?

Eesha Sohail 1D
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Re: when is w=0 and when is q=0?

Postby Eesha Sohail 1D » Sun Feb 02, 2020 11:34 pm

In an adiabatic process, heat does not enter or leave the system. Energy transfer happens only through work, so Q=0.

Sofia Barker 2C
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Re: when is w=0 and when is q=0?

Postby Sofia Barker 2C » Mon Feb 03, 2020 1:14 am

Here's an image from Khan Academy that answers your question and explains the signs of W, Q, and delta U.
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Screen Shot 2020-02-03 at 1.11.04 AM.png

Christineg1G
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Re: when is w=0 and when is q=0?

Postby Christineg1G » Mon Feb 03, 2020 8:49 am

W=0 when the volume of the work done on a gas is constant. Q=0 when there is no heat exchanged (happens if the container is thermally insulated).

kristi le 2F
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Re: when is w=0 and when is q=0?

Postby kristi le 2F » Thu Feb 06, 2020 1:21 pm

Also, if w = 0, the internal energy of the system is determined only by q. If q = 0, the internal energy of the system is determined only by w.


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