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What does the triple point on a phase diagram represent? Select one: a. It represents the...

What does the triple point on a phase diagram represent?

Select one:

a. It represents the conditions under which a substance can exist in two of the three phases in stable form.

b. It represents the point at which the distinction between liquid and gas phases becomes unclear.

c. It represents the conditions of pressure and temperature under which solid, liquid, and gas all co-exist.

d. It represents the point at which the substance undergoes sublimation.

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correct answer is C .

Triple point of a substance is the temperature and pressure at which the three phases of that substance coexist in thermodynamic equilibrium.

At the triple point sublimation curve , fusion curve and vaporisation curve meet.

So according to this definition a, b and d are incorrect.

Diagrammatically it can be represented as

au Melting 1 frunzing Liquid vaporization solid Condensation normon t Gas maint Depasition Temperature

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