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

isochoric/isometric: $\Delta V = 0$
isothermal: $\Delta T = 0$
isobaric: $\Delta P = 0$

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

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?

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?

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

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?

Here's an image from Khan Academy that answers your question and explains the signs of W, Q, and delta U.
Attachments

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

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?

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.