膨胀宇宙中的Sackur-Tetrode方程
On the Sackur-Tetrode equation in an expanding universe
摘要：
在这项工作中，我们调查的热力学性质所满足的膨胀宇宙充满单原子理想气体。我们证明了对于一个被限制在一个恒定体积V中的理想气体，其能量密度、熵密度和化学势的方程保持不变。特别是，如果适当地选择代表宇宙当前熵的常数值，那么计算理想气体熵的萨克尔-泰特罗德方程在膨胀宇宙中也是有效的。
英文摘要：
In this work we investigate the thermodynamic properties satisfied by an expanding universe filled with a monoatomic ideal gas. We show that the equations for the energy density, entropy density and chemical potential remain the same of an ideal gas confined to a constant volume V . In particular the Sackur-Tetrode equation for the entropy of the ideal gas is also valid in the case of an expanding universe, provided that the constant value that represents the current entropy of the universe is appropriately chosen.
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