- #1
Kelsi_Jade
- 59
- 0
The problem reads:
Consider a gas with constant specific heat cv and the van der waals equation of state
(P+ a/v2)(v-b)=RT , where v=V/n
A) Find du and the specific internal energy u=U/n
B) Find ds and the specifi entropy s=S/n
Here's what I've tried so far:
A) I took the initial equation and subbed in the v=V/n :
(P+ a/(V/n)2)(V/n-b)=RT
I know that du= cvdT which can be rearranged cv = du/dT so that is where I can find the du is from the specific heat. However, I don't understand how the van der waals equation can be related mathematically to specific heat?
I know that a=a measure of attraction between particles and b=the volume excluded by a mol of particles. Do I need to solve for these first?
Any help is appreciated!
Consider a gas with constant specific heat cv and the van der waals equation of state
(P+ a/v2)(v-b)=RT , where v=V/n
A) Find du and the specific internal energy u=U/n
B) Find ds and the specifi entropy s=S/n
Here's what I've tried so far:
A) I took the initial equation and subbed in the v=V/n :
(P+ a/(V/n)2)(V/n-b)=RT
I know that du= cvdT which can be rearranged cv = du/dT so that is where I can find the du is from the specific heat. However, I don't understand how the van der waals equation can be related mathematically to specific heat?
I know that a=a measure of attraction between particles and b=the volume excluded by a mol of particles. Do I need to solve for these first?
Any help is appreciated!