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

Posted: Sat Mar 16, 2019 10:32 pm
by Lisa Werner 2F
when is w=0 and when is q=0? what are the key words that indicate these two conditions?

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

Posted: Sat Mar 16, 2019 10:37 pm
by Chem_Mod
Work is 0 when there is no change in volume (isochoric). Heat is 0 for an adiabatic process, which will usually be explicitly stated.

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

Posted: Sun Feb 02, 2020 11:10 pm
by Petrina Kan 2I
What is an adiabatic process?

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

Posted: Sun Feb 02, 2020 11:34 pm
by Eesha Sohail 1D
In an adiabatic process, heat does not enter or leave the system. Energy transfer happens only through work, so Q=0.

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

Posted: Mon Feb 03, 2020 1:14 am
by Sofia Barker 2C
Here's an image from Khan Academy that answers your question and explains the signs of W, Q, and delta U.

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

Posted: Mon Feb 03, 2020 8:49 am
by Christineg1G
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).

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

Posted: Thu Feb 06, 2020 1:21 pm
by kristi le 2F
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.