Solving for degeneracy electron cloud temperature

Click For Summary
To determine the maximum temperature (T_Max) using the relationship P_rel_e = P_ideal, the ideal gas law and the equation of state for real gases must be applied. The ideal gas law is expressed as P*V = n*R*T, while the real gas equation includes an empirical constant: PV = nRT + a(n²/V²). To find T, rearrange the real gas equation to T = (PV - a(n²/V²))/(nR). By substituting known values for pressure, volume, moles, and the gas constant into this equation, one can calculate the temperature. This calculated temperature can then be compared to the given T_Max for accuracy.
kamui1
Messages
1
Reaction score
0
Homework Statement
Assume degeneracy starts to dominate approximately when the pressure expected from a completely degenerate electron gas equals that expected from an ideal gas (P_rel_e=P_ideal=1/2Ptotal) Show that the temperature at that point, which we assume will be the maximum reached, is given by T_max is true
Relevant Equations
Tmax= 7.7x10^7 K mu*mu_e^5/3*(M/M_solar)^5/3
P_rel_e = K(ro/mu_e*m_h)^5/3
P_ideal = nKT
When I try P_rel_e = P_ideal I couldn't get a single number that is close to the given T_Max. It might be that I used the wrong equations but I am not sure. Can anyone give me some guidence on this question?
 
Physics news on Phys.org
To solve this question, you will need to use the ideal gas law equation and the equation of state for a real gas. The ideal gas law equation is P*V = n*R*T, where P is the pressure, V is the volume, n is the number of moles, R is the universal gas constant, and T is the temperature. The equation of state for a real gas is PV = nRT + a(n2/V2), where a is an empirical constant that depends on the type of gas.To find the maximum temperature with a given pressure, you will need to solve the equation of state for the temperature. First, rearrange the equation of state to solve for T:T = (PV - a(n2/V2))/(nR)Then, substitute the known values of P, V, n, and R into the equation to solve for T. You can then compare the calculated maximum temperature to the given value to see if it is close.
 
I want to find the solution to the integral ##\theta = \int_0^{\theta}\frac{du}{\sqrt{(c-u^2 +2u^3)}}## I can see that ##\frac{d^2u}{d\theta^2} = A +Bu+Cu^2## is a Weierstrass elliptic function, which can be generated from ##\Large(\normalsize\frac{du}{d\theta}\Large)\normalsize^2 = c-u^2 +2u^3## (A = 0, B=-1, C=3) So does this make my integral an elliptic integral? I haven't been able to find a table of integrals anywhere which contains an integral of this form so I'm a bit stuck. TerryW

Similar threads

  • · Replies 0 ·
Replies
0
Views
1K
  • · Replies 5 ·
Replies
5
Views
3K
Replies
2
Views
2K
  • · Replies 1 ·
Replies
1
Views
3K
  • · Replies 4 ·
Replies
4
Views
2K
Replies
1
Views
1K
Replies
30
Views
4K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 3 ·
Replies
3
Views
7K
  • · Replies 3 ·
Replies
3
Views
2K