Pick out the wrong statement.
A. Minimum number of degree of freedom of a system is zero
B. Degree of freedom of a system containing a gaseous mixture of helium, carbon dioxide and hydrogen is 4
C. For a two phase system in equilibrium made up of four non-reacting chemical species, the number of degrees of freedom is 4
D. Enthalpy and internal energy change is zero during phase change processes like melting, vaporisation and sublimation
Answer: Option D
Solution (By Examveda Team)
Since, during phase change we provide latent heat (enthalpy) for breaking the intermolecular forces obviously the enthalpy changes and also since there will be the difference in potential energy between two different phases the internal energy also changes.This Question Belongs to Chemical Engineering >> Chemical Engineering Thermodynamics
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