Question

At which point on a phase diagram do you have a solid a liquid and a gas simultaneously

Answer 1

In a phase diagram, the point at which the solid, liquid, and gas coexist simultaneously is called the TRIPLE POINT. There is a specified pressure and temperature at which the substance can exist in equilibrium with these three phases being present. 

Answer 2

Answer:

Triple point.

Explanation:

The point in the phase diagram where all the three phases (solid, liquid and gas) exist together is known as triple point.

At triple point:

C= components = 1

P = phase = 3

Therefore degree of freedom will be:

F = C-P+2 = 1-3+2=0

Thus the degree of freedom is zero.

For example:

The triple point of water is at 0.0075 degree celsius and 4.58 mmHg pressure.