How Is Work Calculated When Mass and Temperature Change?

[edwin.07]

1. Given the set-up in Figure 1, how much work will be done after part of the weight is removed, as shown in Figure 2, knowing only the height the piston rises?



2. W=mC[P](T[2]-T[1])+mg(h[2]-h[1])



3. W=mC[P](T[2]-T[1])+(m[2]-m[1])g(h[2]-h[1])

 

[Simon Bridge]

I think you need to go through your posts and explain how you have approached each problem so that we can give you answers that will make sense to you.

 

[rude man]

Is this isothermal, adiabatic or what?

 

[Simon Bridge]

Indeed - the equations won't make much sense without some discussion.
The use of $C_p$ kinda suggests constant pressure is assumed doesn't it?