Identify which one is a first order phase tran- sition? (a) a liquid to gas transition at its critical temperature (b) a liquid to gas transition close to its t

Identify which one is a first order phase tran- sition? (a) A liquid to gas transition at its critical temperature (b) A liquid to gas transition close to its triple point (c) A paramagnetic to ferromagnetic transi- tion in the absence of s magnetic field (d) A metal to superconductor transition in the absence of s magnetic field

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Chandra prakash

I hope my explanation... u understood
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Chandra prakash

clearly option (c )and (d ) are not first order phase transition as it involves symmetry variation . so now confusion can arise only with option (a) and (b ) . in order to avoid that confusion, the key point is the definition of critical point. beyond the critical point, no phase transition is possible, therefore it cannot be right answer...... hence, the correct ans option is ( b) .............
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Dhairya sharma

First-order phase transitions are those that involve a latent heat. During such a transition, a system either absorbs or releases a fixed (and typically large) amount of energy per volume. ... Second-order phase transitions are also called "continuous phase transitions". so b is correct.
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