does not change during phase transformation processes like sublimation melting &...

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__________ does not change during phase transformation processes like sublimation, melting & vaporisation.

A. Entropy

B. Gibbs free energy

C. Internal energy

D. All of the above

Answer: Option B

Solution(By Examveda Team)

Since during phase change the temperature and pressure remains constant we can say the gibbs free energy remains constant and the relation is given by:
For single component and closed system : $$dG = VdP - SdT$$

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