Solved: Consider the Universe to be an adiabatic expansion
Chapter , Problem 27(choose chapter or problem)
Consider the Universe to be an adiabatic expansion of atomic hydrogen gas. (a) Use the ideal gas law and Equation 12.8a to show that TV g21 5 C, where C is a constant. (b) The current Universe extends at least 15 billion light-years in all directions (1.4 3 1026 m), and the current temperature of the Universe is 2.7 K. Estimate the temperature of the Universe when it was the size of a nutshell, with a radius of 2 cm. (For this calculation, assume the Universe is spherical.)
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