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The Hugoniot curve differs from an isentrope in that, for the same compression, it gives

  • A.A higher final density
  • B.A higher final temperature and a higher entropy
  • C.A lower final temperature and a lower entropy
  • D.Exactly the same final state

Answer: B

The Hugoniot relates the states either side of a shock, and because the process is dissipative it reaches a hotter, higher-entropy state than an isentropic compression to the same pressure would. The two curves are tangent to second order at the initial state, which is why weak shocks are nearly isentropic.

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