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A two-phase is said to be in physical equilibrium if

[A].	the temperature of the vapour phase is equal to the temperature of the liquid phase	[B].	the total pressure throughout the vapour phase is equal to the total pressure throughout the liquid phase
[C].	the tendency of each phase is exactly equal to its tendency to escape from the vapour phase to the liquid phase	[D].	all of the above

Answer: Option D