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Author (up) Correa, V. F.; Castro, F. J. url  doi
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  Title First-Order Phase Transformation at Constant Volume: A Continuous Transition? Type Journal Article
  Year 2022 Publication Entropy Abbreviated Journal Entropy  
  Volume 24 Issue Pages 31  
  Keywords  
  Abstract We describe a first-order phase transition of a simple system in a process where the

volume is kept constant. We show that, unlike what happens when the pressure is constant, (i) the

transformation extends over a finite temperature (and pressure) range, (ii) each and every extensive

potential (internal energy U, enthalpy H, Helmholtz energy F, and Gibbs energy G), and the entropy

S is continuous across the transition, and (iii) the constant-volume heat capacity does not diverge

during the transition and only exhibits discrete jumps. These non-intuitive results highlight the

importance of controlling the correct variables in order to distinguish between continuous and

discontinuous transitions. We apply our results to describe the transition between ice VI and liquid

water using thermodynamic information available in the literature and also to show that a firstorder

phase transition driven in isochoric condition can be used as the operating principle of a

mechanical actuator.
 
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  Call Number BT @ victor.correa @ Serial 879  
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