finding work with minimal information


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Jennifer Fimbres
Posts: 37
Joined: Wed Feb 15, 2023 8:20 am

finding work with minimal information

Postby Jennifer Fimbres » Sun Mar 17, 2024 11:25 pm

When only given internal energy and energy absorbed by external forces, how is work supposed to be calculated, is there another formula besides w=p change of v?

Deep Mehta
Posts: 104
Joined: Fri Sep 29, 2023 11:57 am

Re: finding work with minimal information

Postby Deep Mehta » Sun Mar 17, 2024 11:27 pm

You take energy absorbed and in that case q would negative because the system is doing work (energy lost). You use the delta U = q + w equation. And given delta U and q, you would find work

Lucas Vu 2G
Posts: 87
Joined: Fri Sep 29, 2023 12:25 pm

Re: finding work with minimal information

Postby Lucas Vu 2G » Sun Mar 17, 2024 11:28 pm

Using the equation = q + w, you can solve for w as the and the q are given to you as internal energy and energy absorbed by the surroundings.

505998141
Posts: 59
Joined: Fri Oct 06, 2023 8:22 am

Re: finding work with minimal information

Postby 505998141 » Sun Mar 17, 2024 11:30 pm

If you're dealing with a system where pressure-volume work is not the primary factor (for example, chemical reactions, phase changes), or if information about pressure and volume changes is not provided, then the formula W=q−ΔU can be used.

Isaac 14B
Posts: 115
Joined: Fri Sep 29, 2023 12:23 pm

Re: finding work with minimal information

Postby Isaac 14B » Sun Mar 17, 2024 11:33 pm

We can use the formula delta U = q + w and isolate for w (work) when given the change in internal energy energy absorbed by the experimental surroundings.


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