How Do You Prove Thermodynamic Equations for Van der Waals Gas?

AI Thread Summary
To prove thermodynamic equations for a Van der Waals gas, it's essential to start with the internal energy (U) as a function of temperature (T) and volume (V), and enthalpy (H) as a function of temperature (T) and pressure (P). The specific heat capacities, Cp and Cv, are critical for deriving the ratio gamma. The user suggests using the relationship k = (1/v)(dv/dt) but struggles to prove it, indicating the need for additional relevant equations. Reference to external resources, such as Wikipedia on Van der Waals gas, is recommended for further assistance. Understanding these relationships is key to solving the problem effectively.
Outrageous
Messages
373
Reaction score
0

Homework Statement


The question c) I have attached. Capture th.PNG (27.7 KB)
Capture th2.PNG (14.8 KB)

Homework Equations





The Attempt at a Solution


Use U=f(T,V) and H=f(T,P), then get Cp and Cv, so I can get gamma.
then k=(1/v)(dv/dt)
but I still can't prove it.
 

Attachments

  • Capture th.PNG
    Capture th.PNG
    13.7 KB · Views: 446
  • Capture th2.PNG
    Capture th2.PNG
    9.2 KB · Views: 484
Last edited by a moderator:
Physics news on Phys.org
I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
Thread 'Collision of a bullet on a rod-string system: query'
In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
Thread 'A cylinder connected to a hanging mass'
Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
Back
Top