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?

 

[rezeew]

The amount of work done in this situation can be calculated using the formula W=mC[P](T[2]-T[1])+(m[2]-m[1])g(h[2]-h[1]). This formula takes into account the change in temperature (T[2]-T[1]), the change in mass (m[2]-m[1]), and the change in height (h[2]-h[1]). The specific heat capacity (C[P]) of the substance being heated is also a factor in this equation. Therefore, in order to accurately determine the amount of work done, we would need to know the values for all of these variables. Without this information, it is not possible to accurately calculate the work done.