Let's examine a two-dimensional ideal gas within the framework of relativity, where N atoms are restricted to a designated area A. The energy E associated with each particle can be expressed as follows:
E = √(p^2c^2 + m^2c^4)
Here, p represents momentum, m denotes the mass of individual particles, and c signifies the speed of light. Let's explore the ultra-relativistic gas limit, characterized by E > mc^2. This condition is equivalent to an extremely high-temperature limit.
1. Determine the microstate Ω(A, E) of the system under the conditions of the ultra-relativistic gas limit.
2. Calculate the entropy S(A, E) of the system under the conditions of the ultra-relativistic gas limit.
3. Determine the average energy E(T) of the system under the ultra-relativistic gas limit.