"Kent, Russell" wrote:

Thomas J. wrote:

I have no idea what is a triple point...

Adapted from a NASA website:

Triple point: The thermodynamic state at which three phases (solid,
liquid, gas) of a substance exist in equilibrium. The triple point of
water occurs at a saturation vapor pressure of 6.11 millibar and at a
temperature of 273.16 degrees K (0.01 degrees C).

Russell Kent

 
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