Work (in general) [ENDORSED]
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Re: Work (in general)
To find work I always use Work = Fd (opposing force x distance moved). I don't think we learned any other formulas including work in lecture yet.
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Re: Work (in general)
In the book there is also an equation for work that relates the external pressure and volume.
w = -Pex x Delta V
w = -Pex x Delta V
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Re: Work (in general)
For reversible reactions, you would use work= -nRT(ln(Vf/Vi)) or work= -nRT(ln(Pi/Pf)). For irreversible reactions, which we'll probably need to know better for the first exam at least, we use the work equation described above aka work= -(Pext)(delta V).
Re: Work (in general) [ENDORSED]
For irreversible reactions, use w = -P(delta V). However, depending on the information you are given you may also need to use w = -(delta n)RT since PV = nRT.
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