Machine-translated by Google. Questions are authored in English.
Top

Discussion

Entropy of a substance at a given temperature and pressure is normally obtained by

  • A.measuring it directly with an instrument
  • B.reading it from the equation of state alone
  • C.differentiating the enthalpy with respect to pressure
  • D.integrating heat capacity data from a reference state

Answer: D

There is no entropy meter, so the value is built up from calorimetric measurements and latent heats starting from the third law reference. An equation of state then supplies the pressure correction. Absolute entropies are tabulated on exactly this basis.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.