critical and triple points

Question

What are they in physics? Please explain and give examples. Thanks. And please come back again because i might post responses.

Answer 1

Favorite Answer

Critical point:

In thermodynamics, critical point refers to the minimum value of pressure and the maximum temperature for the matter exists in form of liquid. In other words, the liquid and the gaseous phases become indistinguishable.

For example: the critical point of water occurs at around 647 K and 22.064 MPa.

Triple point:

It is the temperature and pressure in which the substance coexist in three phases (gas, liquid and solid) in thermodynamic equilibrium.

The triple point for water is 273.16 K (0.01 K above the melting point of ice), 611.73 Pa.

Source(s): Myself~~~